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Solve... 0.2x + 0.3y =1.3 0.4x …

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Solve... 0.2x + 0.3y =1.3 0.4x + 0.5y = 2.3

Posted by Chhaya Dubey 4 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Saloni Harinkhede 4 years, 2 months ago

Answer Let 0.2x+0.3y=1.3 ....(1) 0.4x+0.5y=2.3 ....(2) Multiply eqn(1) by 10 we get 2x+3y=13 ....(3) Multiply eqn(2) by 10 we get 4x+5y=23 ....(4) Solving equations (3) and (4) 5×(3)⇒10x+15y=65 3×(4)⇒12x+15y=69 Subtracting we get 12x+15y−10x−15y=69−65=4 or 2x=4 or x=2 Substituting x=2 in eqn(3) we get 2x+3y=13⇒2×2+3y=13 or 3y=13−4=9 or y=3 Hence x=2,y=3

1Thank You

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CBSE > Class 10 > Mathematics