SOLUTION: Practice problems: Determine whether each of the following systems is consistent, inconsistent, or dependent: a) 4x-3y = 7 9x + 2y = 5 4x – 3y = 7 – 4x -4x

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: Practice problems: Determine whether each of the following systems is consistent, inconsistent, or dependent: a) 4x-3y = 7 9x + 2y = 5 4x – 3y = 7 – 4x -4x       Log On


   

Question 308921: Practice problems: Determine whether each of the following systems is consistent, inconsistent, or dependent:
a) 4x-3y = 7
9x + 2y = 5

4x – 3y = 7 – 4x
-4x
-3y = 7 + 4x
-3 -3 + 3

y =

Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
4x-3y=7multiply all by 2
9x%2B2y=5multiply all by 3
_ _ _ _ _
8x-6y=14
27x%2B6y=15add these together
35x=29
x=29%2F35
9x%2B2y=5
%28261%2F35%29%2B2y=5
2y=%28175%2F35%29-%28261%2F35%29
2y=%28-86%2F35%29
y=%28-86%2F35%29%281%2F2%29
y=%28-86%2F70%29
y=%28-43%2F35%29