Question

Find the mistake: Explain what the person did incorrectly while solving the problem or how you would solve it.

5x + 8 = 2x + 20


5x + 8 = 2x + 20


-2x -2x


3x + 8 = 20


-8 -8


3x = 12


times each side by 3


x = 36

Answer 1

5x+8=2x+20

Move the variable to the left hand side

5x+8-2x=20

Move the constant to the right-hand side and change its sign

5x-2x=20-8

Collect like terms

3x=20-8
3x=12

Divide both sides of the equation by 3

X=4