Question

NEED ASAP! . PLEASE HELP❤ . Pierre correctly simplified an expression. When he substitutedx=2 into the simplified expression, the value was 20. Which could be Pierre’s original expression? .

2(7x – 4)
2(x – 19)
2(x + 10)
2(5x + 1)

Answer 1

2(7x – 4)

Since:
2(7*2-4)=2(14-4)=2*10=20

Answer 2

option A

Explanation:

Pierre correctly simplified an expression. When he substituted x=2 into the simplified expression, the value was 20.

LEts check with each expression, plug in 2 for x

`2(7x - 4)= 2(7(2)-4)= 2(14-4)= 2(10)= 20`

`2(x - 19)= 2(7-19)= 2(-12)=-24`

`2(x + 10)=2(2+10)=2(12)=24`

`2(5x + 1)=2(5(2)+1)=2(10+1)=22`

option A gives us value 20