Question

Como resolve x/5+x/2=7/10

x-3/4-2x-1/5=5

x/2+3x/5=6

Answer 1

x/5+x/2=7/10 ==> x  +  x =  7   ==> 5x + 2x = 7 ==> 7x = 7 ==> x = 1
                             5      2    10
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x-3/4-2x-1/5=5 ==> x - 3 - (2x-1) = 5       mmc(4,10)
                                  4          4       10

 5(x - 3) - 5(2x-1) = 20  

5x - 15 - 10x + 5 = 20

- 5x = 20 + 10

5x = - 30

x= - 6
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x + 3x = 6
2     5

5x + 6x = 60

11x = 60

x = 60
      11