Answer:
x=20, y=8
Explanation:
4x -4y = 16 over x - 2y = -12
x - 2y = -12 multiplying with 2
2x -4y = -24.................. equation 2
4x -4y = 16........................ equtaion 1
By substraction equation 2 from 1
4x -4y = 16
-2x 4y = 24 ( signs will change)
2x = 40
x = 40/2
x = 20
By putting the value of x in x - 2y = -12
20 - 2y = -12
20- 2y = -12
20+12 =2y
32=2y
y=32/2
y=8
Cross check
Putting values of both x and y in x - 2y = -12
20- 2(8) = -12
20-32 =-12
-12=-12
so LHS= RHS
