Answer:
Add 7 to both sides of the equation [it would look like: 4b - 7 +7 = 13+7]
Step-by-step explanation:
m = 7 n ( the '=' is meant to be the proportional sign)
21 ÷ 3 = 7
35 ÷ 5 = 7
56 ÷ 8 = 7
common factor is 3k-7
b
5a+5b
Multiply each variable in the parenthesis by the number outside.
Hope this helps.
