3,557+x=4*23,557+x=4∗2
3,557+x=83,557+x=8
x=8-3,557x=8−3,557
x=4,443x=4,443
2)\;\tt\displaystyle\frac{x-0,731}{3}=52)
3
x−0,731
=5
x-0,731=5*3x−0,731=5∗3
x-0,731=15x−0,731=15
x=15+0,731x=15+0,731
x=15,731x=15,731
\begin{gathered}3)\;\tt\displaystyle\frac{12,392+x}{5}=2,365+2,635\\\end{gathered}
3)
5
12,392+x
=2,365+2,635
\tt\displaystyle\frac{12,392+x}{5}=5
5
12,392+x
=5
12,392+x=5*512,392+x=5∗5
12,392+x=2512,392+x=25
x=25-12,392x=25−12,392
x=12,608x=12,608
\begin{gathered}4)\;\tt\displaystyle\frac{125,95-x}{2.65+4,35}=6\\\end{gathered}
4)
2.65+4,35
125,95−x
=6
\tt\displaystyle\frac{125,95-x}{7}=6
7
125,95−x
=6
125,95-x=6*7125,95−x=6∗7
125,95-x=42125,95−x=42
x=125,95-42x=125,95−42
x=83,95x=83,95
ответ: 1) 7/16+5/8=(7+10)/16=17/16.
2) 17/16:4 1/4=17/16:17/4=17*4/16*17=1/4.
3) -1-1/3+1/4=1/4-4/3=(3-16)/12=-13/12=-1 1/12.
Пошаговое объяснение: