X+21+x+4=49

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Solution for X+21+x+4=49 equation: 



X+21+X+4=49

We move all terms to the left:

X+21+X+4-(49)=0

We add all the numbers together, and all the variables

2X-24=0

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

2X=24

X=24/2

X=12

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