## Thinking Mathematically (6th Edition)

$x\le \frac{7-9y}{6}$
Given is an inequality $Ax+By\le C;A>0$ where $A,B,C$ are constants. An equivalent inequality can be found by substituting any values for $A,B,C$, which also fulfills the condition$A>0$. An equivalent inequality can be written as follows: $6x+9y\le 7$ This inequality is restructured with $x$ isolated on left side as: $x\le \frac{7-9y}{6}$