What is the solution to the equation cube root of 5 x minus 4 is equal to cube root of 7 x plus 8 ?

The cube root function gives equal outputs only when the numbers inside the roots are equal. Set the radicands equal: 5x − 4 = 7x + 8. Subtract 5x and 8 from both sides to get −12 = 2x, so x = −6; the correct choice is “x is equal to negative 6.”

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