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3x +4y=10 and 2x - 2y=2

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3x +4y=10 and 2x - 2y=2

Posted by Pabitra Sahu 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Sandli __Thakur_✍?✍? 5 years, 7 months ago

3x+4y=10→3x=10-4y → x=(10-4y)/3.......eq.1....similarly we find value of y by putting value if x which we find............so, 2x-2y=2→2[(10-4y)/3]-2y = 2→(now multiply2 by bracket) ,( 20-8y)/3=2+26→→20-8y = 6+6y→→ 20-6= 6y+8y→→ 14=14y→→ 14/14=y→→ 1 = y............hence y=1 .....now put value of y in eq1 ....x=[10-4(1)]/3→→ x=(10-4)/3→→x=6/3..→→x=2....,. Hence x=2 and y= 1 answer

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CBSE > Class 10 > Mathematics

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If 1/2 is a root of equation x^2+kx- 5/4 =0 , then what is the value of k

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CBSE > Class 10 > Mathematics