0
Anonymous
b= 10
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9b-13b= -4b -4b = 40 Divide both sides by -4 b = -10
Gh
15b+2-13 = 13b+6-4b 15b-11 = 9b+6 15b-9b = 6+11 6b = 17 b =17/6 or 2 and 5/6
3A + 9B = 3(A + 3B)
10b