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Solve for t in the equation 34t + \(\frac{...

Solve for t in the equation 34t + 13(21 - t) = 11

A.

913

B.

713

C.

5

D.

935

Correct answer is D

34 t + 13 (21 - t) = 11

  Multiply through by the LCM of 4 and 3 which is 12

  12 x(34 t) + 12 x (13 (21 - t)) = (11 x 12)

  9t + 4(21 - t) = 132

  9t + 84 - 4t = 132

  5t + 84 = 132

  5t = 132 - 84 = 48

  t = 485

  t = 9 35

  Answer is D