How do you solve the equation 2x+13=31?

1 Answer
May 20, 2017

See a solution process below:

Explanation:

Step 1) Subtract color(red)(13) from each side of the equation to isolate the x term while keeping the equation balanced:

2x + 13 - color(red)(13) = 31 - color(red)(13)

2x + 0 = 18

2x = 18

Step 2) Divide each side of the equation by color(red)(2) to solve for x while keeping the equation balanced:

(2x)/color(red)(2) = 18/color(red)(2)

(color(red)(cancel(color(black)(2)))x)/cancel(color(red)(2)) = 9

x = 9