4x+21=-123

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Solution for 4x+21=-123 equation: 



4x+21=-123

We move all terms to the left:

4x+21-(-123)=0

We add all the numbers together, and all the variables

4x+144=0

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

4x=-144

x=-144/4

x=-36

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