Question

find the value of x

Answer 1

for what?

Answer 2

i found x=2 but would you have to plug it in to 3x-15 and 2x+7?

Answer 3

(3x-15)(2x+7)=0
is the question?

Answer 4

sure i guess

Answer 5

in that case
3x-15=0
3x=15
x=5

and

2x+7=0
2x=-7
x=-7/2

so we write x={-7/2,5}