Elimination method:

Exercise: Solve x + y = 12 and x – y = 6 (ii) 2x + y = 10 and x – y = 2

(iii) 2x + 3y = 11, 4x + y = 12 Using elimination method

Substitution method:

Exercise: Solve the following pairs simultaneous equations by substitution method. (a)2x+5y=6 1/2, 5x-2y=9 (b) y=3x, 4y=5x+14.