3x+4+x+x=90

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Solution for 3x+4+x+x=90 equation: 



3x+4+x+x=90

We move all terms to the left:

3x+4+x+x-(90)=0

We add all the numbers together, and all the variables

5x-86=0

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

5x=86

x=86/5

x=17+1/5

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