5. Subtract the second algebraic expression from the first :
(a) 21x' - 11x + 14x - 17x - 28, 9x' + 15x' + 4x? - 15x + 56
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Step-by-step explanation:
21x'-9x'-15x'=11x+4x-14x+17x-28
-3x' = 17x -28
17x + 3x' - 28
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