Question

Solve for x and y 0.4x + 0.3y = 1.7 , 0.7x-0.2y = 0.8​

Answer 1

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Answer 2

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

0.7x−0.2y=0.8....(2).

Multiply both the equations by 10, we get

4x+3y=17...(1)

7x−2y=8...(2)

Multiply (1) by 2 and (2) by 3,

8x+6y=34

21x−6y=24

Adding both the equations

29x=58

x=2

From (1):4×2+3y=17

⇒8+3y=17

⇒3y=17−8=9

y=3

Answer : x=2,y=3

hope it will helps you friend..good night