contestada

-x+y=5; 4x+y=10 .
Part A: Use substitution to find the solution to the systems of equations. Include all of your work in your final answer.
Part B: Algebraically verify your answer to Part A. Include all of your work in your final answer.

Respuesta :

TootsieBear
Part A: -x+y=5
            +x    +x
             y=x+5
4x+x+5=10
5x+5=10
     -5  -5
5x=5
x=1
1(-x) +y=5
-1+y=5
+1     +1
y=6
The solution is (1,6)
Part B: 
-x+y=5
-1+6=5
5=5
4x+y=10
4(1)+6=10
4+6=10
10=10

Otras preguntas