Question 5.

Solve the following simultaneous equation.

5m – 3n = 19; m – 6n = –7

Answer:

Multiply Eq. II by 5

equating (I) and (III), change the sign of Eq. (III)

Adding both we get

⇒

⇒

⇒ n = 2

Substituting n = 2 in Eq 1

⇒ 5m - 3(2) = 19

⇒ 5m - 6 = 19

⇒ 5m = 25

⇒ m = 5

∴ Solution is (m , n) = (5, 2)

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