Question

Solve the system by substitution.
Show work.

Answer 1

wheres the question?

Answer 2

Here it is

Answer 3

ok so try to make it Y= to whatever and tell me what you get on the bottom equation

Answer 4

????

Answer 5

on the bottom you have 3.25x-y=-0.75 so you need to make it Y= so you can plug it into the top equation and solve for the x value right?

Answer 6

do u get it?

Answer 7

-y=3.25x-0.75

Answer 8

-3.25x then you have to divide both sides by negative cuz of the negative Y right?

Answer 9

what?

Answer 10

it would be a -3.25x because u have to subtract 3.25x from both sides in order to move it to the other side and then divide by a negative 1 because u cant have a -Y on the left u need just Y

Answer 11

oh ok so y=-3.25x+0.75

Answer 12

almost what happens to negative 3.25x when u divide by the -1 same thing that happened to the .75 it became a positive

Answer 13

so y=3.25x+0.75!!!

Answer 14

yes now plug that into the y in the top equation and solve for x

Answer 15

-4.5x-2(3.25x+0.75)=-12.5
-4.5x-6.5x-1.5=-12.5
-11x-1.5=-12.5
-11x=-11
x=1

Answer 16

yes!!! hahah now how can you find Y??

Answer 17

by pluging in x but for which equation?

Answer 18

it doesnt matter but the top one is much easier to solve so do it for that one

Answer 19

-4.5x-2y=-12.5
-4.5(1)-2y=-12.5
-4.5-2y=-12.5
-2y=-8
y=4

Answer 20

yeaup and u check those answers by pluggin em both into the bottom equation

Answer 21

or the top doesnt matter

Answer 22

cool thanx:)

Answer 23

no problem!! medals are much appreciated :)

Answer 24

answers are very much appreciated so I guess we're on the same page huh:)