4 n 3 − 1 8 ( 4 n = 4 n 1 − 4 ( 4 n 3 − 72 n = 1 − 16 n − 72 n + 16 n = 1 − 3 − 56 n = − 2 n = − 56 − 2 = 28 1
Multiply both sides by 4: 3n - 72 = n - 16
Subtract n from both sides: 2n - 72 = -16
Add 72 to both sides: 2n = 56 n = 28.
To solve 4 3 n − 18 = 4 1 n − 4 , first isolate n by moving all terms involving it to one side, then simplify and solve. The solution is n = 28 .
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