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4\left(2-3x\right)\left(3x+2\right)+4\left(3x-2\right)^{2}=40x-5\left(5x+2\right)
Multiply both sides of the equation by 20, the least common multiple of 5,4.
\left(8-12x\right)\left(3x+2\right)+4\left(3x-2\right)^{2}=40x-5\left(5x+2\right)
Use the distributive property to multiply 4 by 2-3x.
16-36x^{2}+4\left(3x-2\right)^{2}=40x-5\left(5x+2\right)
Use the distributive property to multiply 8-12x by 3x+2 and combine like terms.
16-36x^{2}+4\left(9x^{2}-12x+4\right)=40x-5\left(5x+2\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(3x-2\right)^{2}.
16-36x^{2}+36x^{2}-48x+16=40x-5\left(5x+2\right)
Use the distributive property to multiply 4 by 9x^{2}-12x+4.
16-48x+16=40x-5\left(5x+2\right)
Combine -36x^{2} and 36x^{2} to get 0.
32-48x=40x-5\left(5x+2\right)
Add 16 and 16 to get 32.
32-48x=40x-25x-10
Use the distributive property to multiply -5 by 5x+2.
32-48x=15x-10
Combine 40x and -25x to get 15x.
32-48x-15x=-10
Subtract 15x from both sides.
32-63x=-10
Combine -48x and -15x to get -63x.
-63x=-10-32
Subtract 32 from both sides.
-63x=-42
Subtract 32 from -10 to get -42.
x=\frac{-42}{-63}
Divide both sides by -63.
x=\frac{2}{3}
Reduce the fraction \frac{-42}{-63} to lowest terms by extracting and canceling out -21.