math
posted by amanda .
Solve the equation
15.3 + 15 + 15.4 + 15.7 + x /5 = 15.4
thankyou

I suspect you mean...
(15.3 + 15 + 15.4 + 15.7 + x) /5 = 15.4
multipy both sides by 5.
15.3 + 15 + 15.4 + 15.7 + x = 15.4 *5
then subtract the four numbers on the left from both sides.