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natali 33 [55]
3 years ago
7

What is the sum of two numbers is 45 and theire difference is 5

Mathematics
1 answer:
adelina 88 [10]3 years ago
6 0

Answer:

let the two numbers be x and y

x+y=45(equation 1)

x-y=5(equation 2)

from equation (1) y=45-x(equation 3)

substitute 45-x for y in equation 2

x-(45-x)=5

x-45+x=5

x+x-45=5

2x-45=5

2x=45+5

2x=50

x=50/2

x=25

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