3*21x=30*21

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Solution for 3*21x=30*21 equation: 



3*21x=30*21

We move all terms to the left:

3*21x-(30*21)=0

We add all the numbers together, and all the variables

3*21x-630=0

Wy multiply elements

63x-630=0

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

63x=630

x=630/63

x=10

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