Question

Solve each equation mentally

Answer 1

Explanation:

a) 2x = 10

Divide both side by 2

x = 10/2

x = 5

b) -3x = 21

Divide both sides by (-3)

x = 21/(-3)

x = -7

`c) (1)/(3)x = 6`

Multiply both sides by 3

x = 6*3

x = 18

`d)(-1)/(2)x = -7`

Multiply both sides by (-2)

x = -7 * (-2)

x = 14