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One number is five less than a second number. Five times the first is 8 more than 6 times the second. Find the numbers.

The value of the first number is ____

1 Answer

8 votes

Answer:

Let the second number be x.

Then the first number is x-5.

Five times the first is eight more than two times the second.

5(x-5)=8+2x

5x-25=8+2x

3x=25+8

3x=33

x=11

The second number is 11.

The first number is 6.

Explanation:

Or you could use this method

F=first number=S-5; S=second number

5F=2S+8 Substitute for F.

5(S-5)=2S+8

5S-25=2S+8 Add 25 to each side.

5S=2S+33 Subtract 2s from each side.

3S=33 Divide each side by 3

S=11 ANSWER 1: The second number is 11.

F=S-5=11-5=6 ANSWER 2: The first number is 6.

CHECK:

5F=2S+8

5(6)=2(11)+8

30=30

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