Question

Solbe 50p+10q=20 and 30p+10q=-4 by elimination method

Answer 1

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Answer 2

Answer:

50p+10q=20 ....(i)

30p+10q=-4. ....(ii)

Subtracting ii from i

(50p +10q) - ( 30p + 10q) = 20 -(-4)

50p + 10q -30p - 10q =20 + 4

20p =24

p =24 /20

=6/5

Substituteing para = 6/5 in i,

50 (6/5) + 10 q = 20

60 + 10q = 20

10q = -40

q = -40 /10

=-4

(p, q ) = (6/5 , -4)