Chapter 6 - Algebra: Equations and Inequalities - 6.4 Linear Inequalities in One Variable - Exercise Set 6.4 - Page 384: 68

\[x\le \frac{7-9y}{6}\]

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: \[x\le \frac{7-9y}{6}\]