Solve the systemSolve the system by either substitution or elimination 4x + 4y = 20, 2x -2y = -18 by either substitution or elim

Question

skad [1K]

3 years ago

8

Solve the systemSolve the system by either substitution or elimination 4x + 4y = 20, 2x -2y = -18 by either substitution or elim

ination

Mathematics

1 answer:

valina [46] · Answer 1 · 2021-12-28T05:28:54+03:00

valina [46]3 years ago

7 0

{4x + 4y = 20 | ÷4<span>
{2x -2y = -18 | </span>÷2

{x + y = 5
{x -y = -9
--------------
2x = -4
x = -2

x + y = 5
-2 + y = 5
y = 5 + 2
y = 7

The answer is (-2, 7)