Question

y = 3x + 3
y = x − 1

Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

Answer 1

3(x-1)=x
3+1=y
so then when you add or subtract you need to put the equations together and then solve

Answer 2

3(x-1)=x
3+1=y
so then when you add or subtract you need to put the equations together and then solve

Answer 3

both equations are equal to y, so replace y in the 1st equation with the right hand side of the 2nd equation

so you get

x - 1 = 3x + 3

now you can solve for x.

when you get x, substitute it into either of the original equations to find y.

hope it helps

Answer 4

that's the substitution method, all you are doing is finding where the 2 lines intersect. on the number plane.

Answer 5

Yeah, there are 2 ways to solve a system of equations. :)