The solution to the system of equations is (-1/3, 11/3)
Answer:
b=−5x+y
Step-by-step explanation:
Let's solve for b.
y=5x+b
Step 1: Flip the equation.
b+5x=y
Step 2: Add -5x to both sides.
b+5x+−5x=y+−5x
b=−5x+y
If
and
, then you can replace
in either equation with the equivalent expression given by the other equation. In this case, you have

and you can solve for
.

Then
.
For the second system, you can write


Then substitute this into the second equation and you get


so that

Step-by-step explanation:
= 4x( x -1) -7( x-1)
= 4x^2 -4x -7x +7
= 4x^2 -11x +7