30+3*x=42

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Solution for 30+3*x=42 equation:



30+3*x=42
We move all terms to the left:
30+3*x-(42)=0
We add all the numbers together, and all the variables
3x-12=0
We move all terms containing x to the left, all other terms to the right
3x=12
x=12/3
x=4

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