0
Anonymous
-6
Michael Scalise ∙
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18
Luis Vicente Vicente ∙
3x - y = 12 is the same as 3x - 12 = y, or y = 3x - 12.
3x + 12 = 42 3x = 30 x = 10
If you mean: 3x+12 then it is 3(x+4) when factorized
3x+12=x+48: 3x-x=-12+48 2x=36 x=18
6x - 12 = 3x + 15 3x = 27 x = 9