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4+p/2=21
We simplify the equation to the form, which is simple to understand
4+p/2=21
Simplifying:
4 + 0.5p=21
We move all terms containing p to the left and all other terms to the right.
+ 0.5p=+21-4
We simplify left and right side of the equation.
+ 0.5p=+17
We divide both sides of the equation by 0.5 to get p.
p=34
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