Question

4x + 8y = 20 and -4x + 2y = -30

Answer 1

Explanation:

Given :-

• 4x + 8y = 20
• -4x + 2y = -30

Adding the equations :-

`: \implies` 10y = -10

`: \implies` y = -1

Put it (i) :-

`: \implies` 4x - 8 = 20

`: \implies` 4x = 20 + 8

`: \implies` 4x = 28

`: \implies` x = 28/4

`: \implies` x = 7