ccook.html

SUBSTITUTION	Step 1-Sove one of the equations for on of its variables. Step 2-Substitute the expression from the first step into the other equation and solve for the other variables. Step 3-Substitute the value from step 2 into the revised equation from step 1 and solve.
GRAPHING	To graph a system of linear inequalities, do the following for each inequality in the system: Graph the line that corresponds to the inequality. Use a dashed line for an inequality with < or > and a solid line for an inequality with < or >. Lightly shade the half-plane that is the graph of the inequality. Colored pencils may help you distinguish the different half-planes. The graph of the system is the region common to all of the half-planes. If you used colored pencils, it is the region that has been shaded with every color.
Linear Combination	Step 1-Multiply one or both of the equations by a consistant to obtain coefficients that differ only in sign for one of the varibles. Step 2- Add the revised equations from step1. Combining like terms will eliminate one of the varibles. Solve for the remaning variable. Step 3-Substitute the value obtained in step 2into either of the original equations and solve for the other variable.
Of course you will want to know how to solve a WORD PROBLEM AND MUCH MUCH MORE