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30-4x=4-
We move all terms to the left:
30-4x-(4-)=0
We add all the numbers together, and all the variables
-4x+30-0=0
We add all the numbers together, and all the variables
-4x+30=0
We move all terms containing x to the left, all other terms to the right
-4x=-30
x=-30/-4
x=7+1/2
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