1/4(12a-28)=-1/3(21-9a)

Solution for 1/4(12a-28)=-1/3(21-9a) equation:

1/4(12a-28)=-1/3(21-9a)

We move all terms to the left:

1/4(12a-28)-(-1/3(21-9a))=0


Domain of the equation: 4(12a-28)!=0

a∈R



Domain of the equation: 3(21-9a))!=0

a∈R


We add all the numbers together, and all the variables

1/4(12a-28)-(-1/3(-9a+21))=0

We calculate fractions


(3a(-)/(4(12a-28)*3(-9a+21)))+(-(-4a1)/(4(12a-28)*3(-9a+21)))=0


We calculate terms in parentheses: +(3a(-)/(4(12a-28)*3(-9a+21))), so:

3a(-)/(4(12a-28)*3(-9a+21))

We add all the numbers together, and all the variables

3a0/(4(12a-28)*3(-9a+21))

We multiply all the terms by the denominator


3a0

We add all the numbers together, and all the variables

3a

Back to the equation:

+(3a)



We calculate terms in parentheses: +(-(-4a1)/(4(12a-28)*3(-9a+21))), so:

-(-4a1)/(4(12a-28)*3(-9a+21))

We add all the numbers together, and all the variables

-(-4a)/(4(12a-28)*3(-9a+21))

We multiply all the terms by the denominator


-(-4a)

We get rid of parentheses

4a

Back to the equation:

+(4a)


We add all the numbers together, and all the variables

7a=0

a=0/7

a=0