21+3x=4.5

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Solution for 21+3x=4.5 equation: 



21+3x=4.5

We move all terms to the left:

21+3x-(4.5)=0

We add all the numbers together, and all the variables

3x+16.5=0

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

3x=-16.5

x=-16.5/3

x=-5+1/2

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