Question

3.) a + 40 = 0 What is the value of a?
a =

Answer 1

a = - 40

Explanation:

a+40=0

First way:

Transpose 40 to the other side (to isolate a) - when transposing signs change ( from positive to negative)

Second way:

Subtract both side what 40 (to cancel 40 and isolate a)

* you have to always isolate variables

Answer 2

a= -40

Explanation: