Question

Use elimination to solve this system of equations. 2r + 3s= 9 and 3r + 2s= 12

Answer 1

(18/5,3/5)

Explanation:

Answer 2

2r + 3s= 9 <=> -6r -9s = -27;
3r + 2s= 12 <=> 6r + 4s = 24;
=> 0*r -5*s = -3 => s = 3/5;

2*r + 3*(3/5) = 9<=> 10*r + 9 = 45 <=> 10*r = 36 => r = 18/5;