Question 1113555
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"Linear" means each variable appears by itself, and only to the first power.  Stated differently, each term is either a constant (no variables) or contains a single variable to the first power.<br>
5y + 3x2 &#8805; 33  no; can't have an x^2 term
17x + 3xz &#8804; 4  no; can't have a term with the product of two variables
7x &#8804; 3xy + 14z - 12  ditto
3x &#8805; 14y + 2z + 13  yes!