2/5x+12+7/5x=21

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Solution for 2/5x+12+7/5x=21 equation: 



2/5x+12+7/5x=21

We move all terms to the left:

2/5x+12+7/5x-(21)=0



Domain of the equation: 5x!=0

x!=0/5

x!=0

x∈R



We add all the numbers together, and all the variables

2/5x+7/5x-9=0

We multiply all the terms by the denominator


-9*5x+2+7=0

We add all the numbers together, and all the variables

-9*5x+9=0

Wy multiply elements

-45x+9=0

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

-45x=-9

x=-9/-45

x=1/5

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