Question

Substitution y=2x-1
Y=-3x-6

Answer 1

y = 2x - 1
y = -3x - 6

Since y of the first equation is equal to y of the second equation, then what each y is equal to in the two equations is equal.

2x - 1 = -3x - 6

Add 3x to both sides.

5x - 1 = -6

Add 1 to both sides.

5x = -5

Divide both sides by 5.

x = -1

Now substitute -1 for x in the first original equation.

y = 2x - 1

y = 2(-1) - 1

y = -2 - 1

y = -3

Solution: x = -1 and y = -3

Answer 2

-3x-6=2x-1
5x=-5
x=-1

y=-3(-1)-6
y=3-6
y=-3

hope this helps!