90x+30;x=4

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Solution for 90x+30;x=4 equation: 



90x+30x=4

We move all terms to the left:

90x+30x-(4)=0

We add all the numbers together, and all the variables

120x-4=0

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

120x=4

x=4/120

x=1/30

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