Question

Pre-Algebra

A student solved the eqation 7x - 5 - 5x = 15 and found x = 5. What might be the student's error?

Answer 1

@EveTheAwsome Thank you for that but I need to figure out HOW the student got x = 5

Answer 2

Step 1. 2x5=15
Step 2: Add 5 to both sides. 2x5+5=15+5 2x=20
Step 3: Divide both sides by 2. 2x/2=20/2
=10

Answer 3

Alright thank you!

Answer 4

This is what the students mistake was
7x-5-5x=15
7x-5x=10
2x=10
x=5
He probably subtracted 5 from 15 instead of adding 5 .

Answer 5

Thank you so much!

Answer 6

No problem