3(a-7)=5(a-1)4a

Solution for 3(a-7)=5(a-1)4a equation:

3(a-7)=5(a-1)4a

We move all terms to the left:

3(a-7)-(5(a-1)4a)=0

We multiply parentheses

3a-(5(a-1)4a)-21=0


We calculate terms in parentheses: -(5(a-1)4a), so:

5(a-1)4a

We multiply parentheses

20a^2-20a

Back to the equation:

-(20a^2-20a)


We get rid of parentheses

-20a^2+3a+20a-21=0

We add all the numbers together, and all the variables

-20a^2+23a-21=0

a = -20; b = 23; c = -21;
Δ = b2-4ac
Δ = 232-4·(-20)·(-21)
Δ = -1151
Delta is less than zero, so there is no solution for the equation