Answer :
Answer:
A. ( 10, 1 )
Step-by-step explanation:
Isolate x for x + y = 11.
x + y = 11
Subtract y from both sides.
x + y - 11 - y
Simplify.
x = 11 - y
Substitute x = 11 - y
[ - ( 11 - y ) = -y - 9 ]
Isolate y for - ( 11 - y ) = -y - 9.
- ( 11 - y ) = -y - 9
Expand - ( 11 - y )
Add 11 to both sides.
-11 + y + 11 = - y - 9 + 11
Simplify.
y = -y + 2
Add y to both sides.
y + y = -y + 2 + y
Simplify.
2y = 2
Divide both sides by 2.
[tex]\frac{2y}{2} =\frac{2}{2}[/tex]
Simplify.
y = 1
Substitute y = 1.
x = 11 - 1
Subtract the numbers: 11 - 1
= 10
x = 10
y = 1
( 10, 1 )