7(х+5)-2(х-3)=7х+35-2х+6=5х+41=5*(-3)+41=-15+41=26
<span>(5/6х+1/7х)*42=82
35x+6x=82
41x=82
x=82:41
x=2
</span>
1.lived
2.bought
3. was reading
4.saw
5. have met
6.was doing
7.have visited
8.was
9.hasn't came yet
10.were playing
11. have doen
12.read
13.was sleeping
14.played
15.was
От слова arithmos что значит" число"