Question

cum se rezolva 40/x+7=12

Answer 1

40/x+7=12
40/x=12-7
40=5 x
x=40/5=8

Dar dacă era 40/(x+7)=12 , atunci
40=12(x+7)
40=12x+84
12x=40-84
x=-44/12=-11/3=-3,(6)

Answer 2

$\frac{40}{x+7} =12 \\ 12(x+7)=40\\ 12x+84=40 \\ 12x=40-84 \\12x=-44 \\ x= \frac{-44}{12} \\ x= -\frac{11}{3}$