please help me anyone ..
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Step-by-step explanation:
(a) 7a + 8b - 6a + a - 2a - 9b
= (7a - 6a + a - 2a )+( 8b - 9b)
= a - a - b
= - b (Ans)
(b) 6xl + 5lx - 11lx + 15
= 6xl + 5xl - 11xl + 15
= 11xl - 11xl + 15
= 15 (Ans)
(c) 8ab + 7ba - 15ab + 6
= 8ab + 7ab - 15ab + 6
= 15ab - 15ab + 6
= 6 (Ans)
(d) 44xy + 15yx - 59xy
= 44xy + 15xy - 59xy
= 59xy - 59xy
= 0 (Ans)
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