3/2x+7=4x

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

3/2x+7=4x

We move all terms to the left:

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


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R


We add all the numbers together, and all the variables

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

We multiply all the terms by the denominator


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

Wy multiply elements

-8x^2+14x+3=0

a = -8; b = 14; c = +3;
Δ = b2-4ac
Δ = 142-4·(-8)·3
Δ = 292
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:

$\sqrt{\Delta}=\sqrt{292}=\sqrt{4*73}=\sqrt{4}*\sqrt{73}=2\sqrt{73}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(14)-2\sqrt{73}}{2*-8}=\frac{-14-2\sqrt{73}}{-16}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(14)+2\sqrt{73}}{2*-8}=\frac{-14+2\sqrt{73}}{-16}
$