Question

2x – 7 = 13

7 – 3x = 9 + x

1/5x = 2x + 3

Answer 1

2x – 7 = 13
add 7 to both sides and then divide both sides by 2

7 – 3x = 9 + x
subtract 7 from both sides, subtract x from both sides, divide both sides by 2.

1/5x = 2x + 3
subtract 2x from both sides, both sides times -1 4/5 (same as times -9/5)