Question

Consider the following pair of equations:

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

3x + 3 = x - 1

Answer 2

yep go on

Answer 3

hint:subtract 3 from both sides

Answer 4

kidrah69 your picture looks freaky

Answer 5

thanks @cami1231 did u do the step?

Answer 6

3x = x - 2?

Answer 7

yep now subtract 1x from both sides

Answer 8

2x = -2?

Answer 9

yep now divide 2x/-2

Answer 10

-1x

Answer 11

thats sort of correct....you get X=-1 because when you divde it cancels out

Answer 12

oo

Answer 13

\[y=3(-1)+3\] now solve this

Answer 14

to get the Y value

Answer 15

i plugged in what we got for the other equation in place of X

Answer 16

y = -3 + 3

Answer 17

yep and what is -3+3?

Answer 18

y = 0

Answer 19

yep so whats the final answer?

Answer 20

(-1,0)