a = 0
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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)
-13
2a+5a+9a = 16a
5a + 2 = 7 subtract 2 from both sides: 5a = 5 divide both sides by 5: a = 1
-59