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There are infinitely many solutions as x + y = 45 defines a straight line. Pick a value for x and you can calculate the y value so that x + y = 45.

It can be rearranged to get y in terms of x:

x + y = 45

→ -x + x + y = -x + 45

→ y = -x + 45

It is a line with slope -1 and intercept 45.

You can substitute any value for x and the corresponding y value will be found.

eg x = 1 → y = -1 + 45 = 44

x = 25 → y = -25 + 25 = 20

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7y ago

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