
Substract '-3.4x' at LHS nad the RHS of the above expression.

Add '4' on both LHS and RHs of the above expression.
 
 
        
             
        
        
        
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200,000 + 80,000 + 3,000 + 900 + 80
        
                    
             
        
        
        
Answer:
C. solution:
 3(3c-2) = 5(2c-1)
 or, 9c-6 = 10c-5 
 or, -6+5 =<em> </em>10c-9c
 or, -1 = 1c
 
Hence, c = -1. 
 
D. solution:
 5(5-2a) = 4(6-a)
 or, 25-10a = 24 - 4a
 or, 25-24 = -4a+10a
 or, 1 = 6a 
 or, 1/6 = a
Hence, a = 1/6. 
 
        
             
        
        
        
Tonne is a metric unit equal to 1000 kilograms.