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y=5
b.) no hay incognita o literal para hallar la suma es incorrecta es 4.5
c.)w+4/5=7/9
w=7/9-4/5
w=-1/45
w=0,02
d.)x-9=32
x=32+8
x=23
e.)x-13,84=6,42
x=6,42+13,84
x=20,26
f.)x-2,3=7,5
x=7,5+2,3
x=9,8
g.)2x=46
x=46/2
x=23
h.)3,2x=12,8
x=12,8/3,2
x=4
i.)8,3x=6/5
41,5x=6
x=6.41,5
x=6,92
j.)5x+16=34
5x=34-16
5x=18
x=18/5
x=3,6
k.)0,01x+1,2=3,3
0,01x=2,1
x=2,1/0,01
x=210