3x - 18 + 105 = 180
3x + 87 = 180
3x = 180 - 87
3x = 93
x = 93/3
x = 31 <==
Answer:
1/8
Step-by-step explanation:
Subtract 9 from both sides. Then you have -14=c/4. Multiply the number by 4. You now have -56=c. :)
23 regular coffees were served.
25% means 1/4
25% x 92 = 23 regular coffees were served.
92 - 23 = 69 decaf coffees were served.
