1/8y+3/4y-3=4

Solution for 1/8y+3/4y-3=4 equation:

1/8y+3/4y-3=4

We move all terms to the left:

1/8y+3/4y-3-(4)=0


Domain of the equation: 8y!=0

y!=0/8

y!=0

y∈R



Domain of the equation: 4y!=0

y!=0/4

y!=0

y∈R


We add all the numbers together, and all the variables

1/8y+3/4y-7=0

We calculate fractions


4y/32y^2+24y/32y^2-7=0

We multiply all the terms by the denominator


4y+24y-7*32y^2=0

We add all the numbers together, and all the variables

28y-7*32y^2=0

Wy multiply elements

-224y^2+28y=0

a = -224; b = 28; c = 0;
Δ = b2-4ac
Δ = 282-4·(-224)·0
Δ = 784
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{784}=28$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(28)-28}{2*-224}=\frac{-56}{-448}
=1/8
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(28)+28}{2*-224}=\frac{0}{-448}
=0
$