the sum of two number is 15 and have an different of 7
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Answer:
7
Step-by-step explanation:
The sum of two numbers is 15, and their difference is 7.
Write a system of linear equations and solve the resulting system.
Let x be the larger number and y be the smaller number.
How do you work out this problem?
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Jan 12, 2014
answer
by: Anonymous
x + y = 15
- x - y = 7
2y = 8
2y/2 = 8/2
y = 4
x + 4 = 15
x + 4 - 4 = 15 - 4
x = 11
check
11 + 4 = 15
15 = 15
11 - 4 = 7
7 = 7
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