How do you solve #–4x + 7y = –10# and #x – 5y = 9# using substitution?
See the entire solution process below:
Step 1) Solve the second equation for
Step 2) Substitute
Step 3) Substitute
The solution is
Using the second equation, we determine a value for
In the first equation, substitute
Open the brackets and simplify. The product of a negative and a positive is a negative.
Divide both sides by
In the second equation, substitute
Open the brackets and simplify. The product of two negatives is a positive.