đỗ thảo
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vì x+3/5=x-1/4nên(x+3).4=5.(x-1) 4. x+4.3=5.x-5 4.x+12=5.x-5 12+5=5.x-4.x 17=x vậy x=17
vì x+3/5=x-1/4nên(x+3).4=5.(x-1) 4. x+4.3=5.x-5 4.x+12=5.x-5 12+5=5.x-4.x 17=x vậy x=17 |