# How do you solve #4x + y = 8# and #y = 4x# using substitution?

The y values in both equations are the same. MAke y the subject in each equation.

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To solve the system of equations ( 4x + y = 8 ) and ( y = 4x ) using substitution, substitute the expression for ( y ) from the second equation into the first equation. This gives ( 4x + 4x = 8 ). Simplify and solve for ( x ), then substitute the value of ( x ) back into either equation to find ( y ).

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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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