Question

Which is the best system of equation to use for the following equations:

6x – 4y = 54
–9x + 2y = –69

Answer 1

elimination, multiply second by 2, and add it to first to eliminate y
then find x---> use it to find y

Answer 2

You're still doing these?

Answer 3

Can you guys explain with exact steps?

Answer 4

You don't know how to multiply the second equation by 2?

Answer 5

6x – 4y = 54
–9x + 2y = –69

multiply equation 2 by 2
-18x+4y = -138

add this to first
6x-4y-18x+4y=54-138
-12x=-84
x=7

put x in first
6*7-4y=54
42-4y=54
-4y=12
y=-3

so x=7 and y=-3