A factory has two assembly lines, M and N, that make the same toy. On Monday, only assembly line M was functioning, and it made 900 toys.

On Tuesday, both assembly lines were functioning for the same amount of time. Line M made 300 toys per hour and line N made 480 toys per hour. Line N made as many toys on Tuesday as line M did over both days.

Write an equation that can be used to find the number of hours, t , that the assembly lines were functioning on Tuesday.

On Tuesday, both assembly lines were functioning for the same amount of time. Line M made 300 toys per hour and line N made 480 toys per hour. Line N made as many toys on Tuesday as line M did over both days.

Write an equation that can be used to find the number of hours, t , that the assembly lines were functioning on Tuesday.

__On Monday__

Line M made 900 toys

__On Tuesday__

Line M made 300 per hour

Line N made 400 per hour

**400t = 300t + 900**{line N made as many on Tuesday as line M over both days}

100t = 900 {subtracted 300t from each side}

t = 9 {divided each side by 100}

**9 hours**

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__Ask the House__