42+3x=90

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Solution for 42+3x=90 equation: 



42+3x=90

We move all terms to the left:

42+3x-(90)=0

We add all the numbers together, and all the variables

3x-48=0

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

3x=48

x=48/3

x=16

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