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Question
Find the value of 5x + 3y − 6z, when x = 3, y = 5 and z = 4
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Solution
5x + 3y − 6z
= 5 × 3 + 3 × 5 − 6 × 4
= 15 + 15 − 24
= 30 − 24
= 6
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