475:4=118целых3/4(/-это дробь)
671:8=83целых 7/8
<span>Х+2=99+1</span>
<span>x+2=100</span>
x=100-2
x=98
98+2=99+1
100=100
<span>92-х=43+14</span>
<span><span>92-х=57</span></span>
<span><span>x=92-57</span></span>
<span><span>x=35</span></span>
<span><span>92-35=43+14</span></span>
<span><span>57=57</span></span>
1) 5x-2y-8=0
12x+18-y=41
y=12x-23
5x-24x+46=8
-19x=-38
x=2
y=1
2) 5x+3y=11
x+21y=59
x=59-21y
2(59-21y)+3(59-22y)=11
118-42y+177-66y=11
295-108y=11
-108y=-284
y=142/51
x=9/17
1215-x=982
x=1215-982
x=233
405*3-233=982