How do you solve a system of equations by using the elimination method?
You follow a sequence of steps.
In general, the steps are:
- Enter the equations.
- Multiply each equation by a number to get the lowest common multiple for one of the variables.
- Add or subtract the two equations to eliminate that variable .
- Substitute that variable into one of the equations and solve for the other variable.
- Check by substituting your answer into one of the equations,
How do you use the elimination method to solve
Step 1. Enter the equations.
Step 2. Find the lowest common multiple.
Multiply Equation 1 by
Step 3. Subtract Equation 4 from Equation 3.
Step 4. Substitute Equation 5 in Equation 1.
Check: Substitute the values of
If you use one equation to get the second variable, use the other equation for the check.
The solution is correct.