78 is added to a mystery number. The result is multiplied by 3. After that 18 is subtracted. The final value is 264. What was the mystery number at the beginning?
Answers
Answered by
0
Answer:
16
Step-by-step explanation:
Let the number be x.
==: [(x + 78) * 3] - 18 = 264
==: 3x + 234 - 18 = 264
==: 3x + 216 = 264
==: 3x = 264 - 216
==: 3x = 48
==: x = 16
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Answered by
0
Answer:
x=16
Step-by-step explanation:
[{x+78}3]-18=282
3x+234=282
3x=282-234
3x=48
x=48/2
x=16
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