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2r-1=9 2r =10 r =5
2.5
9 x 27 equals 243
A + 9 = 21 A = 21 - 9 A = 12
4a - 9 = 27 4a = 36 a = 9
x=7
k equals 5.6
.56x=9-.44x x=9
2,2,6,9
3
-9
10
3x-11 for x=9