Solve by Substitution x-2y=-28 , x-y=-8

Problem

{[x−2*y=−28],[x−y=−8])

Solution

1. Isolate a variable in one of the equations. We can solve the second equation for x by adding y to both sides.

x=y−8

2. Substitute the expression for x into the first equation.

(y−8)−2*y=−28

3. Solve for y by combining like terms.

−y−8=−28

−y=−20

y=20

4. Substitute the value of y back into the expression for x to find the second coordinate.

x=20−8

x=12

Final Answer

(x,y)=(12,20)

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