y=4x+1 y=-x-1 what is the solution

Question

what is the solution

Answer 1

This is a system of equations.  Substitute y in one equation with what y is equal to in the other equation.  It doesn't matter which one you choose in this case.

 

For example,

 

y = 4x + 1           (before substitution)

 

-x - 1 = 4x + 1    (after substitution)

 

Then solve for x to get the value of x.  Plug x back into either equation to get the value for y.

 

 

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