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2.1+4(-4x+1)=-1.9
We move all terms to the left:
2.1+4(-4x+1)-(-1.9)=0
We add all the numbers together, and all the variables
4(-4x+1)+4=0
We multiply parentheses
-16x+4+4=0
We add all the numbers together, and all the variables
-16x+8=0
We move all terms containing x to the left, all other terms to the right
-16x=-8
x=-8/-16
x=1/2
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