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If a = 7, b = 3 and c = -5, then the value of 3a + 4b + 2c = 23
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Answer:

3a + 4b + 2c = 23

3(7) + 4(3) + 2(-5) = 23

Multiply

21 + 12 + (-10) =23

Then add

21 + 12 + (-10) = 23

33 + (-10) = 23

23 = 23

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