How do you solve the system #5x - y = - 14 + 2x + y# and #7x + 9y + 4 = 3x + 8y#?
First simplify both equations:
So now we have two simplified equations:
Using the second equation, determine a value for
In the first equation, substitute
Open the brackets and simplify. The product of two negatives results in a positive.
Divide both sides by
In the second equation, substitute
Open the brackets and simplify. The product of a positive and a negative results in a negative.