Question

Solve 0.3x-0.1y=-0.9 , 0.2x+0.1y=0.4

Answer 1

HOLA

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0.3x - 0.1y = 0.9 == > 3x + 1y = 9

0.2x + 0.1y = 0.4 ==> 2x + 1y = 4

3x + 1y = 9
( Elimination method )
2x + 1y = 4

Multiplying 1 in equation one and two we have

3x + 1y = 9
2x + 1y = 4 ( 1y and 1y got cancelled )
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x = 5

Substituting 3 in 1

3 ( 5 ) + 1y = 9

15 + 1y = 9

1y = 15 - 9 = 6

Y = 6

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Hence we conclude X = 5 and Y = 6

HOPE U UNDERSTAND ❤❤
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