Question

Ravi said " multiplying my number by 10 and adding 5to it give same answer as multiplying my number from 2"?find his number

Answer 1

Define x:

Let the number be x

Form equation:

10x + 5 = 2x

Solve x:

10x + 5 = 2x

Take away 2x from both sides:

8x + 5 = 0

Take away 5 from both sides:

8x = -5

Divide both sides by 8:

x = -5/8

Answer: x = -5/8