Math

substitution

100

y=x+3

y=8

200

2y+7(y=4)

=15

300

2x+3y=10 

x=2-y

 y=6

x=4

400

3x-2y=13 

y=-5

500

4x-5y=-23

x=-2

Elimination

100

3x-y=12

x=5 

y=3

200

8x+y=21

11x-y=17

x=2

300

8x-5y=5

-8x-6y=6

x=0

400

x+y=9

x-y=5

x=14/2

500

-2x-y=-3

2x+2y=2

y=-1

Adding and Subtracting Polynomials

100

7x²+2x+3

3x² +4x-2

10x²+6x+1

200

(x²-x+5)+(6x²+2x-10)

7x²+x-5

300

(5x²+4x+1)+(2x²+5x+2)

7x²+9x+3

400

(a³-2a²)-(3a²-4a)

5a³-5a²

500

(5x²+3x-6)-(3x²-x+5)

2x²+4x-11