What’s the GCF of 84 and 42

need help my boyfriend needs da help! and it needs too be worked out like the pic says

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!