Question

Linear Equations for Two Variables The value of y at x = -1 in the equation 5y = 2 is (a) 52 (b) 25 (c) 10 (d) 0​

Answer 1

Answer:

2x - 3y = 12

5x + 3y = 9 -----(I)

2x - 3y = 12 ----- (II)

Add (I) and (II)

7x = 21

x = 3

Putting the value of x = 3 in (I) we get

5(3)+3y=9⇒15+3y=9⇒3y=9-15=-6⇒y=-2

Thus, (x, y) = (3, -6).