It goes like this
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create 2 distinct numbers by isolating the last digit from the other. For example, 154 becomes 15 and 4.
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double the number derived from the last digit. So, the four becomes 8.
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subtract from the number derived from the preceeding digits. 15 - 8.
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the resulting number is 7. Seven is divisible by 7, so we know 154 is divisible by 7.
Two things can be true. Makeup can be a healthy form of self-expression for people who use it AND a brick in the overall wall that is gendered oppression.