Solve Linear Equations "by Hand"
Introductory algebra courses cover how to solve linear equations by using basic arithmetic to isolate terms. The new functions AddSides, SubtractSides, MultiplySides and DivideSides allow these basic operations to be applied easily. The following illustrates this by solving the system of equations , .
Multiply both sides of the second equation by 2.
Subtract the result from the first equation.
Divide both sides by 5 to solve for .
Multiply both sides of the result by negative 3.
Add the result to the first equation.
Divide both sides by 4 to solve for .