1   1   1        2
2  -3   1      -11            -2R1 + R2 → R2
-1  2  -1        8                R1 + R3 → R3
1    1    1      2
0    -5  -1   -15             R2 ⇔ R3
0    3    0     10
1    1    1      2
0    3    0     10             -R3
0   -5   -1    -15
1    1    1      2
0    3    0     10             1/3 R2
0    5    1     15
1    1    1      2                   -R2 + R1
0    1    0     10/3             -5R2 + R3
0    5    1     15
1    0    1      -4/3               
0    1    0     10/3             -R3 + R1
0    0    1      -5/3
1    0    0       1/3              
0    1    0     10/3            
0    0    1      -5/3
Therefore, x = 1/3, y = 10/3, z = -5/3
        
                    
             
        
        
        
Answer:
x=-1
Step-by-step explanation:
The lines stand for absolute value ( how far a number is from 0), so each number should be a positive, then you just solve for x. Isolate x, then divide on both sides, and you should get -x=1, which is equal to x=-1.
 
        
             
        
        
        
Answer:
ngee hirap Naman niyan sayang
 
        
             
        
        
        
72 square feet
EXPLANATION: when finding area of a rectangle, multiple Length x Width and 6x12=72
        
             
        
        
        
 <h3>
Answer:  1728 dollars</h3>
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Explanation:
1 yard = 3 feet
We'll divide by 3 to convert from feet to yards
- 27 feet = 27/3 = 9 yards
- 18 feet = 18/3 = 6 yards
The basement is 9*6 = 54 square yards in floor area. 
At $32 per square yard, the total cost to carpet the floor is 32*54 = 1728 dollars.