Question

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

Answer 1

Step-by-step 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