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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 157598: Please help me solve the equation 7x-3y=6; x=3
Click here to see answer by jojo14344(1512)

Question 157696: 2.4k-15=3.9k+1 k=?

question is from a handout at night college
Click here to see answer by Earlsdon(6290)

Question 157897: Please help me solve these problems
3x-5y=-8 & 6x+61=y

Click here to see answer by gonzo(654)

Question 158147: 12. Slope undefined; containing the point (-3, 4)
Write the equation using the general form or the slope-intercept form, whichever you prefer. Graph each line.
Click here to see answer by checkley77(12569)

Question 158230: three times the larger of two numbers is equal to four times the smaller. The sum of the numbers is 21 (12+9). Find the numbers.
Click here to see answer by checkley77(12569)

Question 158268: 2p-q=2
2p+3q=22
Equation 1 2p-q=2 Multiply by 3 so, 6p-3q=6
6p-3q = 6
2p+3q = 22
-------------
8p = 28/8
p = 3/8?? looks wrong from here.
Click here to see answer by checkley77(12569)

Question 158271: What number is 33 1/3% of 516?
Click here to see answer by checkley77(12569)

Question 158272: I can not set up the two linear equations for the following word problem.
THERE ARE TWO FLOOR PLANS FOR NEW HOMES. Floor plan #1 and Floor plan #2 and there are 56 houses avalible.
There are three times as many floor plan #2 as there are floor plan #1.
I tried
X+Y =56
x+3y=56
But mathmatically it is not comming out right. I also know the answer is 14 #1 floor plans and 42 #2 floor plans but I am having a problem setting up the equations.
Click here to see answer by checkley77(12569)

Question 158341: The question is Solve the following system of equations using the substitution method. Check your answer.

I'm not sure how to do substitution, so if you could tell me were everything is coming from it would be a great help.
Click here to see answer by Earlsdon(6290)

Question 158342: Solve the following using the elimination method.
5y - 3x = -20
3x - 3y = 14
I'm having trouble with these methods. So if you could show me how you got the numbers you got and what you did exactly, that'd be great.
Click here to see answer by atique.ah(26)

Question 158520: Write a linear equation through the point (-1,-5) perpendicular to the line y=-3x + 4
Click here to see answer by midwood_trail(310)

Question 158543: Solve the system by graphing.
3x-2y=4
-6x+4y=7
Click here to see answer by gonzo(654)

Question 158543: Solve the system by graphing.
3x-2y=4
-6x+4y=7
Click here to see answer by Electrified_Levi(103)

Question 158666: Solve for x:
(x-3)(x+1)>(x+2)(x-1)
Click here to see answer by edjones(7569)

Question 158730: Find the value of K so that the given line has slope m.
kx-3y=7 m=2

Click here to see answer by gonzo(654)

Question 158848: 11x+5y+23=0
7x-2y-0=0
please reply soon as possible
Click here to see answer by stanbon(57422)

Question 158883: FIND THE SLOPE OF THE LINE CONTAINING THE PAIR OF POINTS
(-9-5),(4-3)
Click here to see answer by ankor@dixie-net.com(15667)

Question 158969: how do i solve this equation 1/m + w = c/m?
Click here to see answer by checkley77(12569)

Question 158997: 3y+z=am-4y for y This is chapter 3 section 8
Click here to see answer by checkley77(12569)

Question 159011: km + 5x = 6y, for y This is chapter 3 section 8
Click here to see answer by midwood_trail(310)

Question 159029: 6y+2/3 = c for y Can you please show me step by step formula for the variable specified
Click here to see answer by nerdybill(6963)

Question 159062: i dont get Y=x-4
4x+y=26

Click here to see answer by checkley77(12569)

Question 159005: km+5x=6y, for m solve the equation for the variable specified

Click here to see answer by RegWill(1)

Question 159097: K takes less time than M to travel a distance of 30 miles. K travels 1/3 mile per hour faster than M. If x is K's rate of speed in miles per hour then find K's time for the distance in terms of x
Click here to see answer by nerdybill(6963)

Question 153660: 3x - 2y = 8
-12 + 8y = 32
Click here to see answer by Alan3354(30993)

Question 159202: x + y + z = 6
2x - y + 3z = 9
-x + 2y +2z = 9
Click here to see answer by midwood_trail(310)

Question 159200: 3a - 2b + 7c = 13
a + 8b - 6c = -47
7a - 9b - 9c = -3
Click here to see answer by midwood_trail(310)

Question 159199: 2x-3y+z=5
x+3y+8z=22
3x-y+2z=12
Click here to see answer by midwood_trail(310)

Question 159294: 7. Solve the following system of equations using substitution, elimination, or graphing. Please and Thank you.
y=2x+6
2y+3x=5
Click here to see answer by jim_thompson5910(28598)

Question 159294: 7. Solve the following system of equations using substitution, elimination, or graphing. Please and Thank you.
y=2x+6
2y+3x=5
Click here to see answer by jojo14344(1512)

Question 159381: [C= 60 + .6Y], how do I solve for y?
Click here to see answer by stanbon(57422)

Question 159381: [C= 60 + .6Y], how do I solve for y?
Click here to see answer by KnightOwlTutor(293)

Question 159303: will you help me solve this problem:
9a+7b=-30
8b+5c=11
-3a+10c=73
Click here to see answer by stanbon(57422)

Question 159428: Hi. I need help solving this problem for my physics class. I am a bit rusty on solving systems.
I need to solve for x and y.
47-x=17y
23y+81=-3x
Click here to see answer by jojo14344(1512)

Question 159484: 2-5x>13
Click here to see answer by checkley77(12569)

Question 159585: My problem asks me this:
Solve each system of linear equations.
y=x+2
y=2x
Do I use the xy chart to help work this problem and where do I go from there?
The problem has 2 variables and I don't know how to bring it down to one variable.
Please help me!!
Click here to see answer by ankor@dixie-net.com(15667)

Question 159624: At a club play, 117 ticets were sold. Adults' tickets cost $1.25, and children's tickets cost $0.75. In all, $129.75 was taken in. How many of each kind of ticket was sold?
Click here to see answer by checkley77(12569)

Question 159661: i need help on this problem: 3n-2=10
5
Click here to see answer by oscargut(891)

Question 159632: is 3x=5y a linear equation
Click here to see answer by Alan3354(30993)

Question 159784: how do you do... substitution on this problem 4p+2q=8
q=2p+1
Click here to see answer by KnightOwlTutor(293)

Question 159964: Linear Equation from slope and point: Suppose that f is a linear function with slope 2.6 and that f(5)=-3. What value of x gives f(x)=0?
2nd Question: Linear Equation from two points: Suppose f is a linear function such that f(3)=5 anf f(7)=-4. Find the equation for f.

Thank you, Andie

Click here to see answer by stanbon(57422)

Question 159921: For what values of k will the system of equations be inconsistent?
x=6y+6
kx-3y=6

work shown needed please.

Click here to see answer by Fombitz(13828)

Question 160162: Can you help me with the folowing two questions? Suppose that f is a linear function with slope 4 and that f(3)=5. Find the equation for f. The answer I got was b=-7. Is that right? Do I right the equation f(x)=4(3)-7?
The 2nd question is: Suppose that f is a linear function such that f(3)=5 and f(7)=-4. Find the equation for f. My answer is I think the slope should be -9/4 but what do I do now?

Click here to see answer by vleith(2825)

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