Question

0.4x+0.3y=1.7 , 0.7x+0.2y=0.8 elimination method​

Answer 1

Answer:

$0.4x+0.3y=1.7 , 0.7x+0.2y=0.8 elimination method$

Answer 2

Answer:

(0.4x+0.3y= 1.7) 0.2

0.08x + 0.06y = 0.34....(equation 1)

(0.7x+0.2y=0.8) 0.3

0.21x+0.6y= 0.24....(equation 2)

0.08x + 0.06y = 0.34

0.21x + 0.06y = 0.24

(-) (-) (-) ( changing signs)

__________________ ( cancelling y terms)

-0. 13x= 0.10

x= - 10/13

Putting value of x in any equation

0.4*(-10/13) +0.3y=1.7

-4/13+0.3y =1.7

0.3y=1.7+4/13

y=26.1/13*0.3

y=26.1/3.9

y=87/13