Question

Identify the missing justifications.

Step
Justification
2x - 7 = 15
Given
(a) =
2x - 7 + 7 = 15 +7
(b) =
Addition property of
equality
(a)
2x + 0 = 22
DONE
2x = 22
Additive identity
()2 = ()2
(b)
1x6 = 11
Multiplicative inverse
x = 11
Multiplicative identity

Answer 1

The Solution.

It expression we are working on is given to be

`2x=22`

When both sides were multiplied by 1/2, we have

`(1)/(2)(2x)=(1)/(2)(22)`

The justification is: Multiplicative property of equality.

Thus, the answer is the multiplicative property of equality.