Question

The sum of two numbers is 28. The first number is 7 more than twice the second number. Let a represent the first number. Let b represent the second number. What is the second number?

Answer 1

Answer:

x+y=28--------1

x=2y+7---------2

sub. 2in1

2y+7+y=28

3y=21

y=21/3y=7

sub. y=7 in 1

x+7=28

x=28-7x=21

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Answer 2

Answer:

7 and 21

Step-by-step explanation:

1st no.-x

2nd no.-2x+7

a/q,

x+2x+7=28

3x=28-7

3x=21

x=21/3

x=7

and

2x+7=2×7+7=21