SethRandolph7 SethRandolph7

29-01-2017
Mathematics

Answered

Use either substitution or elimination to solve the following system of equations, find the solution. Show all of your work.

7x + 4y = -5

-2x + 5y = 26

I attached a picture of the problem.

Use either substitution or elimination to solve the following system of equations, find the solution. Show all of your work. 7x + 4y = -5 -2x + 5y = 26 I attach class=

Verified Answer :

mckayla1215 mckayla1215

29-01-2017

Elimination:

-5 (7x+4y=-5) -35x + -20y = 25
4 (-2x+5y=26) -8x + 20y = 104

Y's cancel out

-43x = 129 Divide each side by -43

X = -3

7(-3) + 4y = -5
-21 + 4y = -5 Add 21 to each side
4y = 16 Divide each side by 4
y = 4

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