Question

Simplify 3(a+5);a=12

Answer 1

Explanation:

what we know: a=12

3(a+5)

and so if a is 12, in order to solve this equation we are going to substitute a for 12- meaning this:

3(12+5)

then, you are gonna solve that.

parenthases means to multiply and so 3*12=36 3*5=15 36+15=51.