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Alex73 [517]
3 years ago
8

The sum of three numbers is 78. The second number is 10 more than the first, and the third number is two times the second number

.
1. Write an equation that will help you determine the 3 numbers.
2. Solve the equation showing all your steps.
3. Tell what the 3 numbers are.
Mathematics
1 answer:
Anestetic [448]3 years ago
4 0

Step-by-step explanation:

a+b+c=78

b=10+a

c=2b

then, we back the first

a+10+a+2b=78

2a+2b=78- 10

2a+2(10+a)=68

2a+2a=48

4a=48

a=12

b=22

c=44

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