Question

Solve each system by elimination. 6x + 3y = 30 4x - 3y = 30

Answer 1

Explanation:

6x + 3y = 30 -----------(I)

4x - 3y = 30 -----------(II)

Add equation (I) & (II). So, y will be eliminated and we can find the value of x

(I) 6x + 3y = 30

(II) 4x - 3y = 30 {Now add}

10x = 60

x = 60/10

x = 6

Plugin x = 6 in equation (I)

6*6 + 3y = 30

36 + 3y = 30

3y = 30- 36

3y = -6

y = -6/3

y = -2