SOLUTION: I need help solving these sentences
9x+8y=14
-4x+y=12
Algebra.Com
Question 289138: I need help solving these sentences
9x+8y=14
-4x+y=12
Found 2 solutions by jim_thompson5910, brucewill:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
If we multiply both sides of by -8 we then get . Now add this equation to the first equation to get: . Combine like terms to get: . Finally, solve for 'x' by dividing both sides by 41 to get . Now use this answer to solve for 'y'. I'll let you do that.
Answer by brucewill(101) (Show Source): You can put this solution on YOUR website!
9x + 8y = 14
-4x + y = 12
First, we need to make one variable subtractable (or addable) from the other. In this case, I choose y. Multiple the second equation by 8:
9x + 8y = 14
-32x + 8y = 96
Now, subtract the second equation from the first:
41x = -82
Substitute the x = -2 into the first equation:
9(-2) + 8y = 14
-18 + 8y = 14
8y = 32
Prove the answer, substituting into the original equations:
-18 + 32 = 14. OK.
8 + 4 = 12. OK.
RELATED QUESTIONS
I need help solving y=... (answered by Boreal)
i need help on solving this problem 4x+7y=28,... (answered by stanbon)
Good evening,I am in need of help of a certain topic"Linear system using substitution"... (answered by Edwin McCravy,ewatrrr)
I need help solving these linear equations using the substitution method.
x-y=1... (answered by lynnlo)
I need help solving these linear equations using the substitution method.
x-y=1... (answered by lynnlo)
I need help with these equations please. We are to use the standard form in solving x &... (answered by checkley75,Earlsdon,stanbon)
I need help solving (√(7&4x^8 ) y)^3 (answered by Fombitz)
I need help solving the linear system 5x+y=12... (answered by Alan3354)
I need help finding the conic intersection of these system of equations, please!
x^2 -... (answered by Alan3354)