To isolate a variable you have to “do something to both sides”. i dont know your equation. but you either have to add, subtract, multiply or divide
Answer:
x=60
Step-by-step explanation:
The sum of interior angles of a regular Pentagon is 540°
x+2x+2.5x+x+10+2x+20=540
8.5x=540-30
8.5x=510
x=510/8.5=60
A and b.
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