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

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Question 597171: 6+2x = x-6
x= ?
Click here to see answer by stanbon(75887)

Question 597313: find a fraction whose value is 4/7 and whose denominator is 15 greater than its numerator.
if this is all i am asked, how do i know anything about a numerator or a denominator? how do I slove something like this. when you show me how, can you explain all the steps?
Click here to see answer by solver91311(24713)

Question 597325: Rosa has $3.10 in nickels and dimes. she has 10 less nickels than she has dimes. how many dimes and nickels does she have
Click here to see answer by solver91311(24713)

Question 597325: Rosa has $3.10 in nickels and dimes. she has 10 less nickels than she has dimes. how many dimes and nickels does she have
Click here to see answer by josmiceli(19441)

Question 597371: how do you come up with the answer to this equation x-y=5 and x=2y+1
Click here to see answer by solver91311(24713)

Question 597742: Write a system of equations and solve. The sum of the measures of the two smaller angles in a triangle is 2 degrees less than the measure of the largest angle. If the middle angle measures 40 degrees less than the largest, find the measures of the angles of the triangle.
I realize that my equations will have an x, y and z for the variable but trying to get those equations is what I am having difficulty with.
Click here to see answer by scott8148(6628)

Question 598345: Find the product of the equation below
( 6 x - 5) ( 6 x + 5)
Click here to see answer by jim_thompson5910(35256)

Question 598342: A galaxy far, far away is 100 light years across. If a light year is equal to 5,890,000,000,000 miles, how many miles across is this galaxy in scientific notation?
Click here to see answer by Edwin McCravy(20056)

Question 598346: Simplify the equation, assuming 3 is an exponent

(x + 1) 3
Click here to see answer by Alan3354(69443)

Question 598672: I'm trying to help my son but I need a little help also, anything would be appreciated, shown in a way I can understand Please.
Solve the system of two linear inequalities graphically.
2y is less than -5x-10
5y is equal to or greater than 4x + 20
step one# graph the first inequality: 2y is less than -5x -10

step two# graph the second inequality: 5y is equal to or greater than 4x + 20
step 3# indicate the region that satisfies both inequalities.

Click here to see answer by stanbon(75887)

Question 599146: Y=3/4x+2
Click here to see answer by jim_thompson5910(35256)

Question 600129: the sum of two numbers is 50. Two times the smaller number exceeds the larger number by 31. Find the numbers.
Click here to see answer by godsgirls(5)

Question 600354: 6x+8y+9+2x-y-11

Click here to see answer by jim_thompson5910(35256)

Question 601228: Simplify (3t^2-2t-4)+(t^2-7t+6)
Click here to see answer by jim_thompson5910(35256)

Question 601245: how do you solve for (7xyz)0(5x)?
Click here to see answer by jim_thompson5910(35256)

Question 601346: A 2 digit no is such that the product of its digits is 35. If 18 is added to the Number, the digits interchange their places. Find the Number.
Click here to see answer by flame8855(424)

Question 601366: USE METHOD OF SUBSTITUTION TO SOLVE SYSTEM OF LINEAR EQUATION
7X+5Y=7/6
Y=6X-1
Click here to see answer by lawdej(58)

Question 601438: Hi, I have another one: x y=3x-8 I have to find three ordered pairs that satisfy this equation using 1) x=0 2) x=1 3) x=2
Are these answers right? 1) y = -8 2) y = -5 3) y = -2 if these are wrong can you show me step by step how you got the answer.
Click here to see answer by Alan3354(69443)

Question 601458: use method of substitution to solve the system of linear equations.
7X+5Y=7/2
Y=2X-1
Click here to see answer by flame8855(424)

Question 601543: solve by the elimination method 0.05x +0.25y=44 0.15x +0.05y=48
Click here to see answer by stanbon(75887)

Question 601542: Using the elimination method how do i solve 6x-9y=25.5 7x-3x=-14
Click here to see answer by mananth(16946)

Question 601746: I need to get the solution to these equations using the substitution method:
-x+y=7 and -1/2-y=2
Click here to see answer by stanbon(75887)

Question 601777: I need to know how to solve these equations using substitution thanks:)
-x+y=7 and -1/2x-y=2
Click here to see answer by stanbon(75887)

Question 601822: If 3x + 2y = 22 then 9x + 6y = ____?

Click here to see answer by flame8855(424)

Question 601895: Solve to find x. 2x+y=3 and -7x+2y=17.
Click here to see answer by lawdej(58)

Question 602059: Use the elimination method to solve the system of equations
a+7b=15
a+4b+6
Click here to see answer by Alan3354(69443)

Question 602327: detrmine the value of the relation when x=0, when x=1 and when x=2
Click here to see answer by Alan3354(69443)

Question 602393: solve by using graphical method
y= 5/7x - 2
y= 1/3x + 2/3
I can not figure out how to come up with the 4 plots in order to graph, the fractions throw me off.
Click here to see answer by ewatrrr(24785)

Question 602859: please help me solve this: (5x^4y)(-1/5xy^3)(2xy^2)
Click here to see answer by flame8855(424)

Question 602995: Hello my name is Shamaila and I have problem solving these problems. 1. 5x-3y=1 y=3x-7
2. x=2y-10 4x-y=-47 3. 6x+5y=7 3x-7y=13 4. x-y=3 2x=4+2y 5. y=3x-2 y=2x-9 6. -2x+y=7 4x=2y-14
I will really really appreciate if anyone helps me solve these problems i dont know how to do them. Thank you so much!
My email address is bklynzkuri420@yahoo.com I need it by tonight thank you!
Click here to see answer by ankor@dixie-net.com(22740)

Question 603243: 2x-3y__=4
__-3y+z=2
x____-z= -5
How do you solve??? Please Hurry('X
Click here to see answer by lynnlo(4176)

Question 603551: Determine the best method to solve each system of equations. Then solve the system.
y=2x
x+2y=8
Click here to see answer by Alan3354(69443)

Question 603757: 8x+5y-3x-4y
Click here to see answer by alicealc(293)

Question 603765: Can you please sovle me this equation 2y+3x=1050
Y+x=450
Click here to see answer by mananth(16946)

Question 603886: Can you help me solve the equations ax + by = m and cx + dy = n. somehow the answer is supposed to be those two equations combined into one.
I need an answer asap
everything I have done is wrong and I need to know how to figure them out.

Click here to see answer by Alan3354(69443)

Question 603907: Can you solve the equation 4x-5y=3, x=1/2y-3
Click here to see answer by richwmiller(17219)

Question 603990: Trying to help my 7th grade son with math homework. The problem is: Write an equation with variables on both sides that has a solution of -1 (negative one). Thank You for any assistance!
Sarah
Click here to see answer by scott8148(6628)

Question 604016: 28xy-20x-49y+35
Click here to see answer by Alan3354(69443)

Question 604190: Find an equation of the line that passes through (6,6) and (-6,-6). Write the answer in slope-intercept form, using x as the independent variable.
Click here to see answer by alicealc(293)

Question 604196: Write each expression using positive exponents only:
h -10/8a -9

Click here to see answer by vleith(2983)

Question 604199: Write the number in scientific notation.
0.000073 x 10^-2
Click here to see answer by mananth(16946)

Question 604192: Simplify :(-5)-2
Click here to see answer by flame8855(424)

Question 604178: -4^-1+4^-2
Click here to see answer by flame8855(424)

Question 604432: solve by elimination method
x+y=8
-x+6y=6
Click here to see answer by lynnlo(4176)

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