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PRIMERA PARTE
1)73X
2)7/15
3)X/16
4)22-X
5)X+34
6)7X-5
7)X/3

SEGUNDA PARTE

8)-24X+11X=64+345/84
-13X=64+4.10
-13X=68.1
X=68.1/-13
X=5.23

9)16X=-45+28/5-33/2=
16X=-45+5.6-16.2=
16X=-55.6
X =55.6/16=
X=-3.47

10)(495/21)/(364/27)=
13365/7644X=33-25+18= 13365/76444=1.74
13365/7644X=26
X=26/1.74
X=14.9
11)42X=758-16/3-625-34+256/4=
42X=758-5.3-625-34+64=
42X=157.7
X=157.7/42
X=3.75

12)1316/18X=16-24+144=
1316/18X=136 1316/18=73.11
X=136/73.11
X=1.86

13)33X=-44-27.4-25+18=
33X=-78.4
X=78.4/33
X=-2.37

14)17X=29-(13/21)(11/18)+23=
17X=29-(143/378)+23
17X=29-0.38+23
17X=51.62
X51.62/17=
X3.036

15)158X=457+924-1236+458-478=
158X=123
X =123/158
X=0.77