3x+7x-2x+4=21,4

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Solution for 3x+7x-2x+4=21,4 equation: 



3x+7x-2x+4=21.4

We move all terms to the left:

3x+7x-2x+4-(21.4)=0

We add all the numbers together, and all the variables

8x-17.4=0

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

8x=17.4

x=17.4/8

x=2+1/5.7142857142857

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