Answer: Total cost of their meal is $78
Step-by-step explanation: 20% of 65 is a 13 dollars tip adding up to a total of $78
65*0.2 = 13
65+13=78
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Just divide both sides of the equation by -12 and you get your answer. Hope that helped!
1: x divided 7. 2: 10 + x. 3: x - 14. 4: 8x