x+3x/4=840

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Solution for x+3x/4=840 equation: 



x+3x/4=840

We move all terms to the left:

x+3x/4-(840)=0

We multiply all the terms by the denominator


x*4+3x-840*4=0

We add all the numbers together, and all the variables

3x+x*4-3360=0

Wy multiply elements

3x+4x-3360=0

We add all the numbers together, and all the variables

7x-3360=0

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

7x=3360

x=3360/7

x=480

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