Question

Ryan, Sasha, Connie, and Lawrence completed the following proof. Who completed the proof incorrectly?

Given: 3x+7=5x-11
Prove: x=9

A) Ryan
B) Sasha
C) Connie
D) Lawrence

Answer 1

sasha was incorrect because she divided but said she had subtracted

Answer 2

The person who completed the proof incorrectly is:

Option: B

B) Sasha

Answer with explanation:

Sasha was incorrect with her proof.

She followed as follows:

• 3x+7=5x-11 Given

• 7=2x-11

( She subtracted 3x from both the sides of the equation)

Hence, the property is subtraction property of equality.

• 18=2x

She added 11 on both the sides of the equation.

Hence, the property is addition property of equality.

• x=9

she divided both side of the equation by 2.

Hence, the property is division property of equality but she called it as a subtraction property of equality.