Find the value of m, if x = 2, y = 1 is a solution of the equation 2x + 3y = m.
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Substituting value of x and y in 2x + 3y = m, we get :
⇒ 2(2) + 3(1) = m
⇒ 4 + 3 = m
⇒ m = 7.
Hence, m = 7.
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Solve :
10% of x + 20% of y = 24, 3x - y = 20
The value of expression mx - ny is 3 when x = 5 and y = 6 and its value is 8 when x = 6 and y = 5. Find the values of m and n.