Question

5) Solve, 0.4 x + 0.3 y = 1.7; 0.7 x - 0.2 y = 0.8​

Answer 1

Answer:

as/q

0.4x + 0.3y=1.7...(1)

0.7x - 0.2y= 0.8...(2)

multiplying eq 1 by 2 & eq 2 by 3, we get

0.8x + 0.6y = 3.4..(3)

2.1x - 0.6y = 2.4..(4) now adding eq 3&4

2.9x= 5.8

x=5.8/2.9

x=2

putting the value of x in eq (1)

0.4×2 + 0.3y=1.7

0.3y= 1.7-0.8

y=0.9/0.3

y=3

Answer x=2 y=3

Step-by-step explanation:

May this is helpful to you.