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4x-4/5=2.1/5
We move all terms to the left:
4x-4/5-(2.1/5)=0
We add all the numbers together, and all the variables
4x-4/5-(+2.1/5)=0
We get rid of parentheses
4x-4/5-2.1/5=0
We multiply all the terms by the denominator
4x*5-4-2.1=0
We add all the numbers together, and all the variables
4x*5-6.1=0
Wy multiply elements
20x-6.1=0
We move all terms containing x to the left, all other terms to the right
20x=6.1
x=6.1/20
x=2.90476190476/9.52380952381
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