Solve for y
y=\left(4x+3\right)^{3}
Solve for x
x=\frac{\sqrt[3]{y}-3}{4}
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y=64x^{3}+144x^{2}+108x+27
Use binomial theorem \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} to expand \left(4x+3\right)^{3}.
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