(iii) x(4x - 7) + 3(x + 6)-12x; x = 7
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Step-by-step explanation:
The value of x = 7
7(4×7-7) + 3(7+6) - 12×7
7×21 + 3×13 - 12×7
147 + 39 - 84
= 102.
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