Question

Choose the best method to solve the system of equations:

3x + y = 5
-2x - y = -10
A. Elimination
B. Substitution
C. Graphing

Answer 1

The best method to solve the system of equations 3x + y = 5 and -2x - y = -10 is substitution.

Step-by-step explanation:

To solve the system of equations 3x + y = 5 and -2x - y = -10, the best method is substitution.

1. From equation 1, solve for y: y = 5 - 3x.
2. Substitute this value of y into equation 2: -2x - (5 - 3x) = -10.
3. Simplify and solve for x: -2x - 5 + 3x = -10.
4. Once you have found the value of x, substitute it back into one of the original equations to solve for y.

Hence, the best method to solve the system of equations 3x + y = 5 and -2x - y = -10 is substitution.