Maddi7328
07.11.2019 •
Mathematics
The quantity of x plus 20 over 2 = 3x
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Ответ:
x=4
Step-by-step explanation:
(x+20)/2 = 3x
Multiply 2 on both sides to get rid of denominator
x+20 = 6x
Subtract x on the left side of the equal sign on both sides to isolate the x (variable)
20 = 5x
Divide 5 by both sides to get x
4 = x
Ответ:
1.57ft²
Explanation:
A=πr²
d=2r
A=1/4πd²=1/4·π·2² ≈ 3.14159ft²
Divide 3.141 by 2
1.57ft²