q=(21-15)/2

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Solution for q=(21-15)/2 equation: 



q=(21-15)/2

We move all terms to the left:

q-((21-15)/2)=0

We add all the numbers together, and all the variables

q-(6/2)=0

We get rid of parentheses

q-6/2=0

We multiply all the terms by the denominator


q*2-6=0

Wy multiply elements

2q-6=0

We move all terms containing q to the left, all other terms to the right

2q=6

q=6/2

q=3

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