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Question

If the point (5,4) lies on the graph of the equation 7y = ax+8, find the value of a. [3 MARKS]

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Solution

Explanation : 1 Mark
Calculation : 1 Mark
Result : 1 Mark

If the point (5, 4) lies on the line 7y=ax+8, it must satisfy the equation 7y=ax+8
Therefore, 7x4 = ax5 +8,
Or, 28 - 8 = 5a
Or, 5a = 20
Or, a =4

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