Question

An expression is written as m−5(m+3) +7m. What is the value of the expression when m=x+1?

Answer 1

3x-12

Explanation:

m−5(m+3) +7m

m-5m-15+7m=3m-15

For m=x+1

3(x+1)-15=3x+3-15=3x-12