Question

Alma is solving the equation 4a-5=2a-3 Circle her mistake and correct it.

4a-5=2a-3
4a-2a-5=3
2a-5=3
2a=8

Answer 1

he changed the sign of the 3 on the second row sot its 4a-2a-5=(-3)
2a-5=-3
2a=2
a=1

Answer 2

The mistake is the sing of the "3" on the second term.

a=1

Explanation:

The mistake was changing the sing of the second term in the first step. You could found it highlighted below.

4a-5=2a-3

4a-2a-5=3 ( the correct expression will be 4a-2a-5=-3)

2a-5=3

2a=8

So , the correct answer is

4a-2a-5=-3

2a=5-3

2a=2

a=1