Question

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

Answer 1

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.