Solve for x
x=1
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x+3+3x=7
Add 3x to both sides.
4x+3=7
Combine x and 3x to get 4x.
4x=7-3
Subtract 3 from both sides.
4x=4
Subtract 3 from 7 to get 4.
x=\frac{4}{4}
Divide both sides by 4.
x=1
Divide 4 by 4 to get 1.
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