Substitution/Elimination

Substitution

100

y=3x+5    &    y=x+9

What is, (2,11)

200

y=5x+7   &   y=6x+6

What is, (1,12)

300

y=x+5   &    x+y=11

What is, (3,8)

400

y=2x-3   & 3x+2y= 22

What is,(4,5)

Elimination

100

-3x+3y=3

3x+y=9

What is, (2,3)

200

-5x+3y=2

5x+2y=18

What is, (2, 4)

300

5x-2y=16

x+y=6

What is, (4,2)

400

5x+7y=-2

2x-7y=9

What is, (1,-1)

is this a solution

100

is (3, 2) a solution to the system of equations 

y=x-1    &  y=2x-4

Yes!

200

Is (4,7) a solution to the the system of equations 

y=x+3   &  2x+y=15

Yes!

300

is the point 5,9 a solution

y=x-4     &     x+y=20

NO