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10X + 17 = 67 subtract 17 from each side 10X + 17 - 17 = 67 - 17 10X = 50 divide both sides integers by 10 (10/10)X = 50/10 X = 5 ---------------check in original equation 10(5) + 17 = 67 50 + 17 = 67 67 = 67 -------------checks
10x + y = 67 ( y=17) what does x equal?
Arithmetic mean means that you need to add all the numbersand divide the sum by the number of numbers listed in the problem. Therefore you add 8+12+15+21+11+x= 67 + x Now you multiply 6 times 17, (because there are 6 numbers in the problem which are 8,12,15,21, and 11) 17x6=102 Now: 67+x=102 Solve for x 67+x=102 -67 -67 --------------- x= 35
-67
Yes 17 and 67 are prime numbers.