Question

Solve the Following pair of Simultaneous Equation ; (2x+5y=16) and (5x-4y=7).​

Answer 1

Answer:

x = 3,y =2

Step-by-step explanation:

2x + 5y =16

multiply both side by 4

8x + 20y = 64 eqn (1)

and

5x -4y =7

multiply both side by 5

25x - 20y = 35 eqn (2)

add eqn (1)and (2)

8x +20y=64

25x -20y=35

+_______________

33x = 99

x = 99/33

x. =3

put the value of x in eqn(1)

8*3 +20y = 64

24 +20y =64

20y = 64-24

20y = 40

y =40/20

y =2