Solve the systems of equation by using elimination method Q1

Solution

Q1)

2x+2y = -1 ---------(1)

5x-5y = 1 ----------(2)

from equation 1, x= (-1-2y)/2 ---------- (3)

put this value in equation 2

5(-1-2y)/2 - 5y = 1 => y = -7/20 (answer)

and put this value in equation (3)

x= -3/20 (answer)

Q2)

3x-2y=5

-9x+6y=12

no solution of this system of equation