Question

The sum of one fifth of a number and three is equal to half of the number. what is the number? A.5. B.10. C.15 D.20

Answer 1

The statement correct is: B.10.

Answer 2

1/5x +3 = 1/2x

x/5+3 = x/2

x/5-x/2 +3 =0

2x/10-5x/10 +3 =0

-3x/10 + 3=0

-3x/10 has to equal -3

-3 * x = 30

x=10