122+x+42+x+100=90

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Solution for 122+x+42+x+100=90 equation: 



122+x+42+x+100=90

We move all terms to the left:

122+x+42+x+100-(90)=0

We add all the numbers together, and all the variables

2x+174=0

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

2x=-174

x=-174/2

x=-87

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