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Anonymous
4a+3 when a=3
4(3)+3
12+3=15
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a=5
11a+9 = 4a+30 11a-4a = 30-9 7a = 21 Solution: a = 3
4a+5=25 4a=25-5 4a=20 a=20/4 a=5
4a + a = 25 add 4a and a 5a = 25 then divide 25 by 5 a = 5
a=-12