3x + 9y < 10

(a)  

2x + 5y = 0

(a)  

5x - 10y = 0

(a)  

3x - 5y > 0

(a)  

5x + 10y > 10

(a)  

10x - 20y < 12

(a)  

9x - 3y = 0

(a)  

x + y = 0

(a)  

5x - 10y < 20

(a)  

solve:

Elimination method

x + 2y = 10

x - 2y = 2

(a)  

solve:

elimination method

5x + 3y = 12

-5x + y = 4

(a)  

solve

elimination method

5x - y = 20

4x + y = 7

(a)  

solve

elimination method

x+ y = 10

x - y = 12

(a)  

solve

elimination method

3x - 5y = 20

2x + 5y = 5

(a)  

solve

substitution method

y = x+2

x + y = 3

(a)  

solve

substitution method

2x + 3y = 5

x = y -1

(a)  

solve

substitution method

x + y = 15

x - y = 1

(a)  

solve

elimination method

3x + 5y = 10

2x - 5y = 5

(a)  

solve

elimination method

3x + 6y = 20

- 3x - 2y = -4

(a)