How do you solve #3x + 7y = -6# and #x - 2y = 11#?
1 Answer
Aug 15, 2015
Explanation:
One way is to use the method of elimination.
Step 1. Enter the equations.
[1]
[2]
Step 2. Multiply each equation to get the lowest common multiple of the coefficients of one variable.
Multiply Equation 2 by
[3]
Step 3. Subtract Equation 3 from Equation 1.
[4]
Step 4. Substitute Equation 4 in Equation 1.
Solution: The solution that satisfies both equations is
Check: Substitute the values of
It checks!
Our solution is correct.