Question

Solve the system of equation.
2x-3y=-1
y= x- 1

Answer 1

2x-3y= -1 (label 1)
y=x-1 (label 2)
sub 2 in 1
2x-3(x-1)= -1
2x-3x+3= -1
-x+3= -1
-x=-4
x=4
sub x=4 into 2
y=4-1
y=3

x=4 and y=3

Answer 2

sub
y=x-1 so sub x-1 for y in first equation

2x-3(x-1)=-1
2x-3x+3=-1
-x+3=-1
minus 3 both sides
-x=-4
times -1
x=4

sub

y=x-1
y=4-1
y=3

x=4
y=3
(4,3)