Question

-3x + 7y = -16
-9x + 5y = 16

Part A: Create an equivalent system of equations by replacing one equation with the sum of that equation and a multiple of the other. Show the steps to do this

Answer 1

Name your equations

-3x + 7y = -16 i)
-9x + 5y = 16 ii)

i) x3

Answer 2

what do u get?

Answer 3

-9x+21=-48 iii)

iii)- ii)

Answer 4

sorry meant to say

-9x+21y=-48 iii)

iii)- ii)

Answer 5

16y=-64
y=-4

Answer 6

sub y into ii)

-9x + 5(-4) = 16
-9x=36
x=-4

Answer 7

check the answer by sub x and y values into any of the equations