Question

0.2x+0.3y=1.3 ,0.4x+0.5y=2.3​

Answer 1

Answer:

0.2x+0.3y-1.3=0

0.4x+0.5y-2.3=0

Answer 2

Answer:

0.8625

Step-by-step explanation:

(0.2x+ 0.3y) = 1.3... (A)

(0.4x+0.5y) = 2.3....(B)

2 Multiple by equ (A)

(0.4x+0.6y) = 2.6

Subtract equ (A) From equ (B)

0.4x+0.6y = 2.6

-0.4x-0.5y = -2.3

= 0+ 1y= 0.3

y= 0.3

Put y=0.3in equ (B)

0.4x+0.5(0.3)= 2.3

0.4x+ 0.15= 2.3

0.4x= 2.3/0.15

0.4x= 0.345

x= 0.345/0.4

x= 0.8625