Linear Equations- Elimination 1) 3x+21=5y 2) 4y+6= -9x

Question

Good Afternoon,

I have been trying to figure out the question below but I’m really struggling. Can someone please help me?

Solve the following system by Elimination (rearrange things first so that the terms line up better.

1) 3x+21=5y

2) 4y+6= -9x

Answer 1

3x - 5y = -21

9x + 4y = -6

-3 * equation 1 + equation 2

19y = 57

y = 3

x=-2