Solve using addition - x - y =4, x + 2y =4

For this case we have a system of two equations with two unknowns, given by the variables x and y respectively. To solve we follow the steps below:

1st step:

We eliminate a variable, for this we add both equations

Step 2:

We substitute the value of "y" in any of the equations and clear x:

Thus, the values of the variables are given by:

- 1.613 = -1.6 or -1.61

-1.522 = -1.5 or -1.52

0.587 = 0.6 or 0.59

3.079 = 3.1 or 3.08

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