13x-7+7x-13=180 whats the answer?
Mathematics · High School · Tue Nov 03 2020
llm
Answered on
Lets try to add the variables together and the numbers together.
13x+7x-7-13=180
20x-20=180
Lets put the variables on one side of the equation and the numbers on the other side. Every variable or sign that will change side, will have their sign switched as well from a + into a - and vice versa.
20x=180+20
20x=200
Divide both sides with 20.
20x/20 = 200/20
x=10