252 28 x 9 7 x 4 x 3 x 3 7 x 2 x 2 x 3 x 3 or 252 12 x 21 3 x 4 x 7 x 3 3 x 2 x 2 x 7 x 3 or 252 14 x 42 7 x 2 x 21 x 2 7 x 2 x 7 x 3 x 2
okay if x-4=3 then x=7 bcause 4+3=x = 4+3=7 and 7-4=3!
5
A question of prime factors... The answer is 2 x 2 x 3 x 5 x 7 = 420 2 x 2 x 3 x 5 x 7 gives us a factor of 2... 2 x 2 x 3 x 5 x 7 and of 3... 2 x 2 x 3 x 5 x 7 and of 4... 2 x 2 x 3 x 5 x 7 and of 5... 2 x 2 x 3 x 5 x 7 and of 6... 2 x 2 x 3 x 5 x 7 and of 7.
lcm(3, 7, 15) = 105. 3 = 3 7 = 7 15 = 3 x 5 lcm = 3 x 5 x 7 = 105
x-7 = 3 add 7 to both sides of equation x -7+7 = 3 +7 X = 10
x = 3 and x = 7.x = 3 and x = 7.x = 3 and x = 7.x = 3 and x = 7.
The prime factorization of 63 is 3 x 3 x 7 or 3^2*7 = 633 x 3 x 7 = 6363 = 3 x 3 x 7
3 x 3 x 3 x 3 x 3 x 7 = 243 x 7 = 1701
3 x 3 x 7 = 63 3 x 3 x 3 x 7 = 189 3 x 3 x 7 x 7 = 441
In index form, 378 = 2 x 3 x 3 x 3 x 7 = 2 x 33 x 7
The prime factors are: 3 x 3 x 3 x 3 x 7 x 7 x 7
147 = 3 x 7 x 7, 189 = 3 x 3 x 3 x 7 so GCF = 3 x 7 = 21
2 x 3 x 3 x 7 x 7 = 882 2 x 2 x 2 x 3 x 7 x 7 x 7 = 8232 2 x 2 x 2 x 3 x 3 x 7 x 7 x 7 = 24696, the LCM
4
44 = 22 x 11 63 = 32 x 7
147 = 3 x 7^2 or 3 x 7 x 7