Question

Solve the proportion to determine the value of x.

2x / 5 = x+3 / 3

Answer 1

When you solve a proportion, your first step should be to cross-multiply.


`(2x)/(5)` =
`(x + 3)/(3)`

When you cross-multiply, you should get this equation:

(2x)(3) = (x + 3)(5)

Now, solve it using algebra.

(2x)(3) = (x + 3)(5) Multiply
6x = 5x + 15 Subtract 5x from both sides
x = 15

The value of x is 15.