2. Solving Multi-Step Equations
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Use the percent change to find the cost of the meal items with tax.
Equation: 1.08(2t+2.50)+3=13.80
Solution: $3.75
To write an equation for the given situation, we really need to think about each factor that goes into the calculation of our total cost.
The total cost is $13.80, the $3 tip is a constant added after the tax and ordered items are already taken into consideration. ...+3=13.80
2t+2.50
To account for sales tax, we need to use the percent change in the total cost. The sales tax is 8 % so the total cost of the meal is going to be 8 % higher. 100 %+8 %=108 % We can multiply the cost of the meal by this percent change. However, for simplicity, let's think about this in the decimal format rather than as a percentage, 108 %=1.08.