Convert the Constraints into Linear Equations by Using Slack Variables $z=2 x_{1}+8 x_{2}$

Convert the constraints into linear equations by using slack variables.
-Maximize $z=2 x_{1}+8 x_{2}$
Subject to: $x_{1}+6 x_{2} \leq 15$
$2 x_{1}+9 x_{2} \leq 25$
$x_{1} \geq 0, x_{2} \geq 0$

A) $\mathrm{x}_{1}+6 \mathrm{x}_{2}+\mathrm{s}_{1} \leq 15$
$2 x_{1}+9 x_{2}+s_{2} \leq 25$
B) $x_{1}+6 x_{2}+s_{1} \geq 15$
$2 \mathrm{x}_{1}+9 \mathrm{x}_{2}+\mathrm{s}_{2} \geq 25$
C) $\mathrm{x}_{1}+6 \mathrm{x}_{2}=\mathrm{s}_{1}+15$
$2 \mathrm{x}_{1}+9 \mathrm{x}_{2}=\mathrm{s}_{2}+25$
D) $\mathrm{x}_{1}+6 \mathrm{x}_{2}+\mathrm{s}_{1}=15$
$2 \mathrm{x}_{1}+9 \mathrm{x}_{2}+\mathrm{s}_{2}=25$