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4x\left(2x-3\right)^{2}-\left(48x^{2}-x\right)=16\left(x-2\right)^{3}+4
Multiply both sides of the equation by 4.
4x\left(4x^{2}-12x+9\right)-\left(48x^{2}-x\right)=16\left(x-2\right)^{3}+4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-3\right)^{2}.
16x^{3}-48x^{2}+36x-\left(48x^{2}-x\right)=16\left(x-2\right)^{3}+4
Use the distributive property to multiply 4x by 4x^{2}-12x+9.
16x^{3}-48x^{2}+36x-48x^{2}+x=16\left(x-2\right)^{3}+4
To find the opposite of 48x^{2}-x, find the opposite of each term.
16x^{3}-96x^{2}+36x+x=16\left(x-2\right)^{3}+4
Combine -48x^{2} and -48x^{2} to get -96x^{2}.
16x^{3}-96x^{2}+37x=16\left(x-2\right)^{3}+4
Combine 36x and x to get 37x.
16x^{3}-96x^{2}+37x=16\left(x^{3}-6x^{2}+12x-8\right)+4
Use binomial theorem \left(a-b\right)^{3}=a^{3}-3a^{2}b+3ab^{2}-b^{3} to expand \left(x-2\right)^{3}.
16x^{3}-96x^{2}+37x=16x^{3}-96x^{2}+192x-128+4
Use the distributive property to multiply 16 by x^{3}-6x^{2}+12x-8.
16x^{3}-96x^{2}+37x=16x^{3}-96x^{2}+192x-124
Add -128 and 4 to get -124.
16x^{3}-96x^{2}+37x-16x^{3}=-96x^{2}+192x-124
Subtract 16x^{3} from both sides.
-96x^{2}+37x=-96x^{2}+192x-124
Combine 16x^{3} and -16x^{3} to get 0.
-96x^{2}+37x+96x^{2}=192x-124
Add 96x^{2} to both sides.
37x=192x-124
Combine -96x^{2} and 96x^{2} to get 0.
37x-192x=-124
Subtract 192x from both sides.
-155x=-124
Combine 37x and -192x to get -155x.
x=\frac{-124}{-155}
Divide both sides by -155.
x=\frac{4}{5}
Reduce the fraction \frac{-124}{-155} to lowest terms by extracting and canceling out -31.