By minusing 12 to both sides
d+12=2
-12=-12
d =-10
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➷ 3x + 1 = 511
Subtract 1 from both sides:
3x = 510
Divide both sides by 3:
x = 170
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Answer:
15(2) + x(2)= perimeter
Step-by-step explanation:
Answer:
=-4
Step-by-step explanation: