Solve by Linear Combination 2d-e=7 d+e=5

$2 d - e = 7$ $d + e = 5$

Step 1

To solve a system of $1$ variables, only $1$ equations are required. Choose the first two equations containing the variables in the system.

$2 d - e = 7$

Step 2

The addition method can only be used on systems of two equations, and both must contain a variable.

Can\'t be solved with addition method.