3/4x-7=-8+2x

Solution for 3/4x-7=-8+2x equation:

3/4x-7=-8+2x

We move all terms to the left:

3/4x-7-(-8+2x)=0


Domain of the equation: 4x!=0

x!=0/4

x!=0

x∈R


We add all the numbers together, and all the variables

3/4x-(2x-8)-7=0

We get rid of parentheses

3/4x-2x+8-7=0

We multiply all the terms by the denominator


-2x*4x+8*4x-7*4x+3=0

Wy multiply elements

-8x^2+32x-28x+3=0

We add all the numbers together, and all the variables

-8x^2+4x+3=0

a = -8; b = 4; c = +3;
Δ = b2-4ac
Δ = 42-4·(-8)·3
Δ = 112
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{112}=\sqrt{16*7}=\sqrt{16}*\sqrt{7}=4\sqrt{7}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-4\sqrt{7}}{2*-8}=\frac{-4-4\sqrt{7}}{-16}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+4\sqrt{7}}{2*-8}=\frac{-4+4\sqrt{7}}{-16}
$