q-q+q+q=4

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Solution for q-q+q+q=4 equation: 



q-q+q+q=4

We move all terms to the left:

q-q+q+q-(4)=0

We add all the numbers together, and all the variables

2q-4=0

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

2q=4

q=4/2

q=2

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