Question

Solve each equation mentally

Answer 1

Answer:

Step-by-step 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

$c) \frac{1}{3}x = 6$

Multiply both sides by 3

x = 6*3

x = 18

$d)\frac{-1}{2}x = -7$

Multiply both sides by (-2)

x = -7 * (-2)

x = 14