set y = y
4x + 1 = x - 2
you finish it.
how do i solve systems?
example- y=x-2 y=4x+1
2 answers
Multiple the first equation by -1:
-y=-x+2
Add it from the second one to get:
y=4x+1 +(-y=x+2)= 0=3x+3
Subtract 3 from both sides:
-3=3x
Divide by 3
x=-1
Plug it in for one equation:
y=(-1)-2
y=-3
-y=-x+2
Add it from the second one to get:
y=4x+1 +(-y=x+2)= 0=3x+3
Subtract 3 from both sides:
-3=3x
Divide by 3
x=-1
Plug it in for one equation:
y=(-1)-2
y=-3