Question

As part of a school contest, Sarah and Luis are playing a math game. Sarah must pick a number between 1 and 50 and Luis clues so he can write an equation to find her number. Sarah says, " if I subtract 5 from my number, multiply that equality by 4, and then add 7 to the result, I get 35." What equation can Luis write based on Sarah's clues and what is Sarah's number?

Answer 1

If x is Sarahs number then
(x-5)×4+7=35
subtract 7 from both sides
4(x-5)=28
divide by 4 on both sides
x-5=7
add 5 to both sides
x=12

Answer 2

Answer:

Sarah's number is 12.

Step-by-step explanation:

First you would take Sarah's solution number, which is 35 , and do the opposite of everything that adds up to it.

i.e 35-7=28

28/4=7

7+5=12