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WintryTurtle
03.02.2020 •
Mathematics
The sum of three numbers is 131. the second of three numbers is seven more than twice the first. the third number is 12 less than the first. what equation can be used to solve the problem?
a. x + x + x = 131
b. x + (x + 7) + (x _ 12) = 131
c. x + (2x + 7) + (x _ 12) = 131
d. x + (2x + 7) _ 12 = 131
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Ответ:
The second number: 2 x + 7.
The third number: x - 12.
C ) x + ( 2 x + 7 ) + ( x - 12 ) = 131
We can also solve it:
4 x - 5 = 131
4 x = 136
x = 34
Three numbers are: 34, 75 and 22.
34 + 75 + 22 = 131
Ответ:
95833333333
Step-by-step explanation: