Question

5x + 2y = 8

x + y = 4
If you want to solve the system of equations by addition, which of the following could you do?

Answer 1

ita a

Explanation:

Answer 2

Multiply the equation x+y =4 by -5
The resultant would be-
-5x -5y = -20
Adding this with 5x +2y =8
Then, the resulting would be,
-3y = -12
∴ y=4
and x=4-4 =0