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A+5=-5a+5 A=-5a+5-5 (bring one of the 5 over)(not necessary) A=-5a (if big and small letters are the same, A=a=0; if not, when A=35,a=-7)
If you mean: 5a2+24a-5 then it is (5a-1)(a+5) when factored
Oh, come on! 6a - 5a = a, 7 - 5 = 2
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5a + 2 = 7 subtract 2 from both sides: 5a = 5 divide both sides by 5: a = 1