soution of equation 6x +3y = 8 and 15x - 7y = 10
Answers
6*(15-7=10)-15*(6+3=8)
(90-42=60)-(90
Given:
6x + 3y = 8 and 15x - 7y = 10
To find:
Solve the equation
Solution:
6x + 3y = 8 ........ (i)
15x - 7y = 10 ...... (ii)
On multiplying eq. (i) by 7, we get
6x + 3y = 8 ] × 7
⇒ 42x + 21y = 56 ..... (iii)
On multiplying eq. (ii) by 3, we get
15x - 7y = 10 ] × 3
⇒ 45x - 21y = 30 ..... (iv)
On adding eq. (iii) & (iv), we get
42x + 21y = 56
45x - 21y = 30
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87x = 86
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∴ x =
On substituting the value of x in eq. (i), we get
(6 × ) + 3y = 8
⇒
⇒
⇒
⇒
Thus,
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