7(4a -3) - 3a{8 - 2 al+2 a)}
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Step-by-step explanation:
7(4a - 3) - 3a {8 - 2 al + 2 a)}
7(a)- 3a {6 al +2 a)}
7a - 3a { 8 x 2 - 1)}
5a{ 16-1 )}
5a{ 15)}
a= 15 / 5
a= 3
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