3/4x-7=-x+7

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

3/4x-7=-x+7

We move all terms to the left:

3/4x-7-(-x+7)=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-(-1x+7)-7=0

We get rid of parentheses

3/4x+1x-7-7=0

We multiply all the terms by the denominator


1x*4x-7*4x-7*4x+3=0

Wy multiply elements

4x^2-28x-28x+3=0

We add all the numbers together, and all the variables

4x^2-56x+3=0

a = 4; b = -56; c = +3;
Δ = b2-4ac
Δ = -562-4·4·3
Δ = 3088
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:

$\sqrt{\Delta}=\sqrt{3088}=\sqrt{16*193}=\sqrt{16}*\sqrt{193}=4\sqrt{193}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-56)-4\sqrt{193}}{2*4}=\frac{56-4\sqrt{193}}{8}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-56)+4\sqrt{193}}{2*4}=\frac{56+4\sqrt{193}}{8}
$