Solve for y
y=0
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40+2y=40
Multiply 2 and 20 to get 40.
2y=40-40
Subtract 40 from both sides.
2y=0
Subtract 40 from 40 to get 0.
y=0
Product of two numbers is equal to 0 if at least one of them is 0. Since 2 is not equal to 0, y must be equal to 0.
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Limits
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