1. Find the LCM of each group of the following

(a) 12

A) using prime factorization (dividing with a prime factor until everything is a prime number, then multiplying the prime numbers by each other once), u can calculate their lcm

122=2x61

15=5x3

834=2x3x139

then multiply the prime factors once,

2x3x5x61x139 = 254,370

b) i'm assuming that u solve the equation first bc u didnt put any commas

42-12-16=14

3-92+20=-69

do prime factorization

14=2x7

-69=-23x3

multiply the factors

-23x7x3x2=-966