x=42
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12x-30=114 12x=114+30 x=144 / 12 therefore x=12
x=6 y=30
(12 / 30) x 100 = 40Therefore, 12 is 30 percent of 40.
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
x equals 6 5 times 6 equals 30