2x+5(2.8x-5.4)=21

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Solution for 2x+5(2.8x-5.4)=21 equation: 



2x+5(2.8x-5.4)=21

We move all terms to the left:

2x+5(2.8x-5.4)-(21)=0

We multiply parentheses

2x+10x-27-21=0

We add all the numbers together, and all the variables

12x-48=0

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

12x=48

x=48/12

x=4

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