# How do you solve the system #y = 5x - 7# and #-4 + y = -1 # by substitution?

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To solve the system y = 5x - 7 and -4 + y = -1 by substitution, you first solve one of the equations for one of the variables and then substitute that expression into the other equation. Then, you solve the resulting equation for the remaining variable.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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