Algebra · real student question

Solve the equation 60x = 35.

Question

Solve

60x=3560x=35

Step-by-step solution

  1. Divide both sides by the coefficient. The variable is multiplied by 6060, so dividing by 6060 isolates it in one step:

    x=3560x=\frac{35}{60}

    The answer is a fraction, not an integer — 6060 does not divide 3535 — and leaving it as a fraction keeps it exact.

  2. Reduce the fraction. Factor both parts: 35=5×735=5\times7 and 60=5×1260=5\times12, so the greatest common divisor is 55:

    x=35÷560÷5=712x=\frac{35\div5}{60\div5}=\frac{7}{12}

    Since 77 is prime and does not divide 1212, this is lowest terms.

  3. Give the decimal form. The denominator 12=22×312=2^{2}\times3 contains a 33, so the decimal repeats:

    x=712=0.5830.5833x=\frac{7}{12}=0.58\overline{3}\approx0.5833

  4. Verify in the original equation.

    60712=60127=57=35 60\cdot\frac{7}{12}=\frac{60}{12}\cdot7=5\cdot7=35\ \checkmark

    Cancelling the 1212 into the 6060 first makes the check a single mental step. Confirmed in exact rational arithmetic ✓.

  5. Sanity-check the size. Since 3535 is a bit more than half of 6060, the answer should be a bit more than 12\tfrac12 — and 7120.583\tfrac{7}{12}\approx0.583 is ✓. That quick magnitude check catches a flipped fraction such as 127\tfrac{12}{7} immediately.

Answer

x=7120.5833x=\frac{7}{12}\approx0.5833

Need to solve a different problem like this? Open the solver →