1.4 solving two step and multiple-step equations 2r+20=200

Steps for solving:

Start by isolating 2r by subtracting 20 from both sides.

This leaves us with 2r = 180.

Now divide both sides by 2 and r = 90.

r = 90

Step-by-step explanation:

Our goal is always to get the variable we're trying to solve for on one side of the =, and everything else on the other side. Since we are solving for r here, we want to get rid of the 20 first, and then the 2.

subtract 20 from both sides:

2r = 200 - 20 = 180

divide both sides by 2:

r = 180 / 2 = 90