1.4 solving two step and multiple-step equations 2r+20=200
2 answers:
Answer:
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:
divide both sides by 2:
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 <em>r = 90</em> .
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