Question

When 10 is added to the number that is produced by doubling the number x, the result is equal to 5 times the number that is 7 less that x. What is the value of x?

Answer 1

10+2(x)=5(x-7)
10+2(x)=5(x)-35
35+10=5(x)-2(x)
45=3(x)
45/3=x
x=15