Question

the solution of 2x - 5Y = 4 and 3x - 2Y = -16

Answer 1

Answer:

Step-by-step explanation:

2x-5y = 4 (1)

3x-2y = -16 (2)

Subtracting (2) from (1)

2x-5y-3x+2y = 4+16

-x-3y = 20

-(x+3y) = 20

x+3y = -20

x+3y+20 = 0

Answer 2

here,

2x-5y = 4

2x = 4+5y        (equation one)

x = (4+5y)/2     (equation two)

3x-2y = -16

putting the value of x here from equation two

3*(4+5y)/2 - 2y = -16

(12+15y)2 - 2y = -16

(12+15y-4y)/2 = -16

12+15y-4y = -16*2

12+11y = -32

11y = -32-12

11y = -44

y = -44/11

therefore, y = -4

putting this value in equation one we get,

2x-5y = 4

2x-5(-4) = 4

2x+20 = 4

2x = 4-20

2x = -16

x = -16/2

x = -8

therefore,

x = -8

y = -4