Question

Determinati nr ,,x" Stiind ca : 57 pe 31 - 16 pe 31 = x -21

Answer 1

$\frac{57}{31} - \frac{16}{31} = x - 21$

$\frac{57 - 16}{31} = x - 21$

$\frac{41}{31} = x - 21$

$31(x - 21) = 41$

$31x - 651 = 41$

$31x = 41 + 651$

$31x = 692$

$x = \frac{692}{31}$