Questions on Algebra: Systems of Linear Equations answered by real tutors!

Tutors Answer Your Questions about Linear-systems (FREE)

Question 103775: Using substitution to find the point (x,y)
y=3-2x
y=5+2x
Click here to see answer by jim_thompson5910(28476)

Question 103946: Rectangle of a perimeter is 240cm. If the lenght of rectangle is decreased by 10% & breadth is increased by 20% the perimeter remain same(i.e. 240cm) find the length & breadth of rectangle
Click here to see answer by ankor@dixie-net.com(15624)

Question 103770: I need a real-life application of a linear function. State the application, give the equation of the linear function, and state what the x and y in the application represent. I have to choose at least two values of x to input into my function and find the corresponding y for each. State, in words, what each x and y means in terms of your real-life application.
Click here to see answer by elima(1433)

Question 104064: how do i draw a line of best fit on a scatter plot?
Click here to see answer by stanbon(57219)

Question 104376: I need help solving this word problem....
Click here to see answer by stanbon(57219)

Question 104437: 2. For the following system:
{2x+3y=8}
{-3x+4y=-1}
a. x value smaller than y
b. y value smaller than x
c. no solution
d. infinite solutions
Click here to see answer by jim_thompson5910(28476)

Question 104506: How do I solve the following system by substitution
5x-2y=-5
y-5x=3

The solution for this system is =>

Click here to see answer by Earlsdon(6287)

Question 104530: Solve the following system.
3x - 6y = 9
x -2y = 3
Is this going to turn into a fraction? If so, how do I do it? Not sure. Thank you for your helpin getting me going in the right direction..
Click here to see answer by Fombitz(13828)

Question 104573: Multiply both sides of each equation by a common denominator to eliminate the fractions. then solve the system
x/2 + y/3 = 8
2x/3 + 3y/2 = 17
Click here to see answer by jim_thompson5910(28476)

Question 104602: I am having a problem finding a line that goes through (4,6)(5,8)
I am using y2-y2 over x2-x1
8-6= 2
5-4= 1
Then y=mx+b
y-5= 5(x+b) I get lost from here unless I am missing something. Any help would be appreciate. Thanks in advnace.
Click here to see answer by scott8148(6628)

Question 104489: Find the values for m and b in the following system so that the solution to the system is (-3,4)
5x+7y=b
mx+y=22

The value for m =>

The value for b =>

Click here to see answer by ankor@dixie-net.com(15624)

Question 104789: Your teacher is giving you a test worth 100 points containing 40 questions. There are two-point and four-point questions on the test. how many of each are on the test?
K what we have to do is write two linear equations and solve them, I have no idea how to do it so i need help please!
Click here to see answer by doukungfoo(195)

Question 104816: Suppose you are starting an office-cleaning service. You have spent $315 on equiptment. To clean an office, you use $4 worth of supplies. You charge $25 per office. How many offices must you clean to break even?
K what you do is write a linear equation for the problem and then you solve..but i have no idea. please help!!
Click here to see answer by cheesey(22)

Question 104831: Suppose you bought supplies for a party. Three rolls of streamers and 15 party hats cost $30. Later, you bought 2 rolls of streamers and 4 party hats for $11. How much did each roll of streamers cost? How much did each party hat cost?
K you have to write a linear equation and then solve it. Please help.
Click here to see answer by scott8148(6628)

Question 104886: Write a system of two equations in two unknowns for each problem. Solve each system by substitution.
Tickets for a concert were sold to adults for $3 and to students for $2. If the total receipts were $824 and twice as many adult tickets as student tickets were sold, then how many of each were sold?
I'm struggling with how to set this problem up and solve it. Is it somthing like: 3a>2=824?
Click here to see answer by oberobic(2304)

Question 104825: A new parking lot has spaces for 450 cars. The ratio of spaces for fullsizes cars to compact cars is 11 to 4. hhow many spaces are for full-sized cars? How many spaces are for compact cars?
k what you are suppose to do is write a linear equation and solve it. I am smart lol i just cant do word problems well! lol please help me!
Click here to see answer by edjones(7569)

Question 104783: Your teacher is giveing you a test worth 100 points conataining 40 questions. Therere are two-point and four-point questions on the test. how many of each are on the test?
K what we have to do is write two linear equations and solve them, I have no idea how to do it so i need help please!
Click here to see answer by elima(1433)

Question 104903: Using 7 coins to purchase an ice cream for $.85, what combination of quarters,nickles & dimes would you need equalling $.85 Use each coin at least once.
I know the answer is 2 quarters, 2 dimes & 3 nickles by breaking it down to
$.25 + $.10 + $.05= $.40, leaving 4 coins to equal $.45. What is the equation for a problems 3 unknowns? And how do I go about solving without just knowing?
Click here to see answer by Fombitz(13828)

Question 104818: The math club and science club had fundraisers to buy supplies for a hospice. the math club spent $135 buying six cases of juice and one case of bottled water. The science club spent $110 buying four cases of juice and two cases of bottled water. how much did a case of juice cost? how much did a case of bottled water cost?
K this one also needs to be written in a linear equation form and solved..i'm really bad at this stuff! please help me
Click here to see answer by ptaylor(2048)

Question 104979: At Gwen's garage sale, all books were one price, and all magazines were another price. Harriet bought four books and three magazines for $1.45, and June bought two books and five magazines for $1.25. What was the price of a book and what was the price of a magazine?
So first of all, I think all of the tutors are awesome!!! Thank you so much for offfering your services. My question on this is I need to write a system of 2 equations in 2 unknowns and then solve it. How would I set this up?
Click here to see answer by elima(1433)

Question 105124: I keep trying over and over again but cannot find the solution to this:
(3m-2)/5 = (4-m)/3

everytime I do it i keep getting m=6.5 .

Click here to see answer by ankor@dixie-net.com(15624)

Question 105119: if v = ir what does i =?
Click here to see answer by elima(1433)

Question 105117: if v=ir what does i=?
Click here to see answer by checkley75(3666)

Question 105334: when solving 5x-27=13, first____?____ to each side, then____?___ on both sides.
Click here to see answer by checkley75(3666)

Question 105345: sovle 5x-27=13 and check your result.
Click here to see answer by checkley75(3666)

Question 105783: How do I rewrite the equation -8x-5y=-45 as a function of x?
Click here to see answer by bucky(2189)

Question 105783: How do I rewrite the equation -8x-5y=-45 as a function of x?
Click here to see answer by Fombitz(13828)

Question 105220: 2x-4/4 is less than or equal to 1+x/3
Click here to see answer by Fombitz(13828)

Question 105806: 2x + 3y = 9
4x + 6y = 12
solve for x and y
2x = 9-3y
x = (9/2)-(3y/2)
4((9/2)-(3y/2)) + 6y = 12
18-6y+6y=12
18=12 ????
what am I doing wrong?
thanks

Click here to see answer by Fombitz(13828)

Question 105803: 3x-5y=7
-9x+15y=-21
solve for x and y
Click here to see answer by checkley75(3666)

Question 105907: what is 846+n=-536
Click here to see answer by HyperBrain(694)

Question 105869: In solving -3y+14=98, Paula instructed her CAS to divide both sides by -3.

a. What result did she get?
Click here to see answer by edjones(7569)

Question 105962: Graph the linear equation 4x-5y=40
Click here to see answer by alvinjohnburgos(11)

Question 105981: Factor each trinomial
7x^2+x-8
4m^2-17m+18
14m^2+17m-22

Click here to see answer by kmcruz09(38)

Question 106200: Solve for x. Specify restrictions, if any, on the value of x: 3x+8/x=-14.
I don't even understand about restrictions???? Please help me solve and find restrictions.
Click here to see answer by Fombitz(13828)

Question 106351: How to slove {y=-x+3}{y=3/2x-2}

Click here to see answer by solver91311(16868)

Question 106447: Please help me with solving this equation. I came up with the answer 5/6 but I am not sure that this is right. 6x + 4(3x – 2) = 6x + 2. Thank-you
Click here to see answer by stanbon(57219)

Question 106514: A system of linear equations has solutions (1, -1) and (-2,3).
a)Can you find another solution?
b)How many solutions must exist?
Click here to see answer by stanbon(57219)

Question 106545: Find the equation of the line through the points (4,-1) and (2,-7). Write the equation in standard form with only integers.
Is standard form ax+by=c? If so, how do I go about puting this in standard form?
Click here to see answer by jim_thompson5910(28476)

Question 106610: How would you solve this by using the elimination method?
2x+12y=7
3x+4y=1
Click here to see answer by jim_thompson5910(28476)

Question 106702: How would you solve this equation, by either using the substitution method or the elimination method?
3x/4-y/3=7/6
x/2+2y/3=5/3
Click here to see answer by jim_thompson5910(28476)

Question 106623: solve please and show steps 3x-6y=9

Click here to see answer by elima(1433)

Question 106701: find the value of x
2x + 6
Click here to see answer by MathLover1(6614)

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