Question

solve x and y
1)0.4x+0.3y=1.7
0.7x+0.2y=0.8
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Answer 1

0.4 X + 0.3Y =1.7 ( Multiply by 2)

0.8 X + 0.6 Y =3.4 ..............(1)

Also 0.7 X +0.2 Y =0.8 (Multiply by 3)

2.1 X + 0.6 Y = 2.4 ................(2)

Subtracting(1)( 2)

-0.4X=-1.7

X=1.7/0.4=4.25

Put the value if X in eqn 1

0.8(4.25)+0.6y=3.4

3.4 + 0.6y =3.4

Y=0