Answer:
26000000
Step-by-step explanation:
sorry if its wrong
 
        
             
        
        
        
2.5x - 3 + 2x = 1.75x - 1.25x + 13
4.5x - 3 = 0.50x + 13
4.0x = 16
x = 4
Answer: 4
2. We'll assume those xs are in the numerator
(3/7)x - 1/4 + (3/7)x = (9/7)x - (3/7)x + 3/4 - 1
(6/7)x - 1/4 = (6/7)x  - 1/4
0 = 0
That's always true.
Answer: Any x is a solution.
 
        
                    
             
        
        
        
x =2       y =8
2x + 2y=20
2x=20-2y
x=10-y
Ahora len la otra ecuacion remplazamos x por (10-y)
-2(10-y)-6y=-52
-20+2y-6y=-52
2y-6y= -32 (-52+20= -32)
-4y=-32
-y=-8
y=8            x=10-y  x=2
2*2+2*8=20
4+16=20
-2*2-6*8= -52
-4-48= -52
 
        
             
        
        
        
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