Question

What will be the first step in answering this equation 9z+3=3z+15 ?

Answer 1

9z-3z+3=15

Explanation:

move variable to the left hand side

Answer 2

Subtract 3z from each side

Explanation:

9z+3=3z+15

Subtract 3z from each side

9z-3z+3=3z-3z+15

6z +3 = 15

Subtract 3 from each side

6z+3-3 = 15-3

6z = 12

Divide by 6

6z/6 = 12/6

z=2