861.11/121 = 7.12 approx.
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There are infinitely many solutions to 11x - 99 = 11(x - 9)
121
11
-11x=22011x=-220x=-220/11=-20
12x - 5 = 11x + 5(1) add 5 to both sides:12x - 5 + 5 = 11x + 5 + 512x = 11x + 10(2) next subtract 11x from both sides:12x - 11x = 11x - 11x + 10x = 10