Solve each system of equations algebraically.
x + y = 3
- 2x + y = -6

How do you solve this, I can't seem to comprehend this, its hard for me. ;



Answer :

The solution to the system of equation is the point where both lines intersect and it is at (3, 0)

System of equations

Given the following system of equations

x + y = 3

- 2x + y = -6

Graphically, the point where both lines intersect on the place is the solution to the given system of equation.

From equation 1, x = 3 - y

Substitute into equation 2:

- 2(3-y) + y = -6

-6 + 2y + y = -6

3y = -6 + 6

y = 0

Substitute y = 0 into any of the equation

x + y = 3

x + 0 = 3

x = 3

Hence the solution to the given system of equation is (3, 0)

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