Answer:
I'm assuming you inserting the variable x was a mistake.
Step-by-step explanation:
The least common multiple of 18 and 42 is 126.
[tex]\bold{Step-by-step}[/tex]
[tex]\mathrm{"LCM"}[/tex]
[tex]18 \times 7 = 126\\42 \times 3 = 126[/tex]
Any concerns, let me know, have a great day!