Question

solve for x and y x+2y=3
3x-2y=-7​

Answer 1

Step-by-step explanation:

x + 2y = 3

x + 2y - 3 = 0 (eqn. no. 1)

3x - 2y = - 7

3x - 2y + 7 = (eqn. no. 2)

adding eqn no. 1 and eqn no. 2

(x + 2y - 3) + (3x - 2y + 7)

= (x + 3x) + (2y - 2y) + (-3 + 7)

= 4x + 0 + 4

= 4x + 4

= 4x + 4 = 0

4x = - 4

x = -4/4

x = - 1

putting the value of x in eqn no. 1

x + 2y = 3

-1 + 2y = 3

2y = 3 + 1

2y = 4

y = 4/2

y = 2

x = -1

y = 2