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2.1x+3=51.3-1.35x
We move all terms to the left:
2.1x+3-(51.3-1.35x)=0
We add all the numbers together, and all the variables
2.1x-(-1.35x+51.3)+3=0
We get rid of parentheses
2.1x+1.35x-51.3+3=0
We add all the numbers together, and all the variables
3.45x-48.3=0
We move all terms containing x to the left, all other terms to the right
3.45x=48.3
x=48.3/3.45
x=13+1/1
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