How do you solve #10 + 4x =31 + x#?
x = 7
10 + 4x = 31 + x
Decide the side of the equation where variable terms (contain x) will stay.
Ex: variable terms will stay on the LEFT side of the equation.
Substract on BOTH sides of the equation the constants and variable terms you want to get rid of.
Ex: Get rid of 10 on the LEFT side of the equation, then substract 10 on BOTH sides.
Ex: Get rid of x on RIGHT side of the equation, then substract x on BOTH sides.
10-10 + 4x-x = 31-10 + x-x
4x-x = 31-10
then variables terms will be on ONLY one side of the equation and constants will be on the OTHER side of the equation
3x = 21
Divide BOTH sides of the equation by the value that multiplies x.
Ex: 3 multiplies x, then divide BOTH sides of the equation by 3.
3x÷3 = 21÷3
there is the answer: x = 7