Find the value of x- y if 4x + 3y = 25, 3x + 4y = 24
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Solution
4x + 3y = 25 .....(i)
3x + 4y = 24 .....(ii)
Equation (i) is multiply by 3 and (ii) by 4
∴ y = 3
∴ 4x + 3(3) = 25
4x = 16
x = 4
∴ x - y = 4 -3 = 1
Concept: Linear Equations in Two Variables Applications
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