Question

X/2 + Y= 0.8 ;7/x+y/2=10 solve this sum by elimination method​

Answer 1

Step-by-step explanation:

x/2 + y = 0.8

-> x + 2y = 1.6

x = 1.6 - 2y

-> 14+xy = 20x

14 + x(1.6-x)/2 = 20x

28 + 1.6x - x^2 = 40x

x^2 + 38.4x - 28 = 0

5x2 + 192x - 140 = 0

x =(-192-√39664)/10=(-96-2√ 2479 )/5=-39.116

x =(-192+√39664)/10=(-96+2√ 2479 )/5= 0.716