Răspunsuri

2014-10-30T14:19:24+02:00
 \frac{144}{ \frac{x-4}{2} } -3=1

 \frac{144}{x-4} * \frac{1}{2} =1+3

 \frac{144}{2(x+4)} =4

 \frac{72}{x-4} =4

4*(x-4)=72

x-4= \frac{72}{4}

x-4=18

x=18+4

x=32

1234- \frac{1234}{x} =617

- \frac{1234}{x} =617-1234

- \frac{1234}{x} =-617 | *(-1)

\frac{1234}{x} =617

x= \frac{1234}{617}

x=2

 \frac{55}{11+ \frac{480}{x} } =5

5*(11+ \frac{480}{x} =55

11+ \frac{480}{x} = \frac{55}{5}

11+ \frac{480}{x} =11

 \frac{480}{x} =11-11

 \frac{480}{x} =0

La exercitiul 3 lipseste ceva, deoarece nu poti imparti un numar la 0.