Sanjay solved the equation below. Which property did he use to determine that 7x + 42 = 42 is equivalent to 7x = 0?

Question

asked Jul 8, 2019 1.2k views

2 Answers

ExiRe · Answer 1 · 2019-07-14T01:41:55+0000

For this case we have the following expression:

7x + 42 = 42

From here, we must clear the value of x.

For this, we apply the following property :

Substraction property of equality: Subtract the same number on both sides of equality.

We have then:

$7x + 42-42 = 42-42\\7x = 0$

Answer:

he used Substraction property of equality