For this case, we apply distributive property. By definition, the distributive property states that:
[tex]a (b + c) = ab + ac[/tex]
If we have [tex]-6 (3-x) = 18[/tex], this equals:
[tex]-18 + 6x = 18[/tex]
We add 18 to both sides of the equation:
[tex]-18 + 6x + 18 = 18 + 18\\6x = 36[/tex]
We divide between 6 on both sides of the equation:
[tex]\frac {6x} {6} = \frac {36} {6}\\x = 6[/tex]
so, x equals 6.
Answer:
[tex]x = 6[/tex]
