Solving two-step linear equations using multiplication and division: x/a + b = c

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Examples
Lessons
  1. Find x in the equation modelled by each diagram.

    1. Solving two-step linear equations using multiplication and division

    2. model and solve two-step linear equations using multiplication and division
  2. Solve.
    1. 3+x4=513 + \frac{x}{4} = 51
    2. 17=10+x217 = 10 + \frac{x}{{ - 2}}
    3. x621=9\frac{x}{{ - 6}} - 21 = - 9
    4. 1=23+x8 - 1 = 23 + \frac{x}{8}
  3. The amount of time needed for an ice cube to melt when the temperature is between 10 °C to 30 °C can be expressed by the equation t=16C2t = 16 - \frac{C}{2}, where t is the amount of time for the ice cube to melt in minute; and C is the temperature in degree Celsius.
    1. Will the ice melt in 10 minutes if the temperature is 10 °C?
    2. What was the lowest temperature for the ice cube to melt in 5 minutes?