How much would the dinner (without tip) have cost without the coupon?

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1 Answer
Jun 20, 2018

The dinner would cost $42 without tip and without the coupon.

Explanation:

You can write an equation for this scenario.
x represents the value of the dinner you're trying to find.
Convert 20% to a decimal, which will be 0.20. But since you're adding tip to the dinner amount, so it will be 1.2.
The equation for this scenario that you are solving will be 1.2x-10=40.40.
Solve for x by first adding 10 to both sides. 1.2x=50.40.
Divide 1.2 to both sides, which will give you x=42, the cost of the dinner.