The expression "12 minus r" represents the subtraction of the variable "r" from the constant 12. This operation can be simplified as 12 - r. The result is a difference, where the value of "r" is subtracted from 12.
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-5 = 7 + 3r | subtract 7 -12 = 3r | divide by 3 -4 = r
If 100-r=99.52, r=100-99.52 and r=.48.
It is y - 12.
It is 1 - r/7
2/3 - 12 = -11 1/3 or minus eleven and one third.