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Lelu [443]
3 years ago
10

the sum of three numbers is 85. The second is 7 more than the first. The third is 2 more than four times the second. Find the nu

mbers
Mathematics
1 answer:
Jet001 [13]3 years ago
8 0
The first number - x
The second number is 7 more than the first - x+7
The third number is 2 more than 4 times the second - 4(x+7)+2
The sum of the numbers is 85.

x+x+7+4(x+7)+2=85 \\
x+x+7+4x+28+2=85 \\
6x+37=85 \ \ \ |-37 \\
6x=48 \ \ \ |\div 6 \\
x=8 \\ \\
x+7=8+7=15 \\
\\ 4(x+7)+2=4 \times 15+2=60+2=62

The numbers are 8, 15 and 62.
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