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(12 / 30) x 100 = 40Therefore, 12 is 30 percent of 40.
The prime factors of 12 are: 2 x 2 x 3 The prime factors of 30 are: 2 x 3 x 5
12x-30=114 12x=114+30 x=144 / 12 therefore x=12
x=42
90+x+72+30 = 180. If you add 90+72+30, you get 192. But to get 180 you have to subtract 12. 90+(-12)+72+30 =180 if x is -12