121=13x+4

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Solution for 121=13x+4 equation: 



121=13x+4

We move all terms to the left:

121-(13x+4)=0

We get rid of parentheses

-13x-4+121=0

We add all the numbers together, and all the variables

-13x+117=0

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

-13x=-117

x=-117/-13

x=+9

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