Question

EX1
a) 37,56+47,05-x=17,017
b) x-(10,07+3,03)=1,01
c) 437-x+2,135=300,3
d)37,5+14,07-x=17,03
e)314-136,85+x=379
f)x+12,5-10,6=40,01
EX2
a) (3x+0,1):1,6=(1,75)la puterea 2
b) (2x-1):1,75=0,4
c) (x+0,21+0,1025):1,25=0,15+0,01•10
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Answer 1

a) 37,56+47,05-x=17.017 => x = 84.61-17.017=>x=67.593
b) x - (10.07+3.03)=1.01 => x-13.10=1.01=> x= 14.11
c) 437-x+2.135 = 300.3 =>x=439.135-300.3 =>x=138.835
d)37.5+14.07-x=17.03 =>x=51.57-17.03=>x=34.54
e)314-136.85+x=379=>177.15+x=379=>x=379-177.15=>x=201.85
f)x+12.5-10.6=40.01=>x+1.9=40.01=>x=40.01-1.9=>x=38.2

Ex2 
a)(3x+0.1):1.6=1.75^2 => (3x+0.1):1.6=3.0625=> 3x+0.1=4.9=> 3x=4.8=>x=1.6

b) (2x-1):1.75=0.4 => 2x-1 = 0.7=>2x=1.7=>x=0.85
c) (x+0.21+0.1025):1.25=0.25=> x+0.3125=0.3125 => x = 0 

Answer 2

ex 1)
37.56+47.05-x=17.017
84.61-x=17.017
x=84.61-17.017
x=67.593

b)x-(10.07+3.03)=10.01
x-13.1=10.01
x=10.01+13.01
x=23.11

c)437-x+2.135=300.3
437-x=300.3-2.135
437-x=298.165
x=437-298.165
x=138.835

d)37.5+14.07-x=17.03
51.57-x=17.03
x=51.57-17.03
x=34.54

e)314-136.85+x=379
177.15+x=379
x=379-177.15
x=201.85

f)x+12.5-10.6=40.01
x+1.9=40.1
x=40.1-1.9
x=38.2

ex 2)
a)(3x+0.1):1.6=1.75x1.75
(3x+0.1):1.6=3.0625
3x+0.1=3.0325x1.6
3x+0.1=4.9
3x=4.9-0.1
3x=4.8
x=1.6

b)(2x-1):1.75=0.4
2x-1=0.4x1.75
2x-1=0.7
2x=0.7+1
2x=1.7
x=0.85

c)(x+0.21+0.1025):1.25=0.15+0.01x10
(x+0.3125):1.25=0.15+0.1
(x+0.3125):1.25=0.25
x+0.3125=0.25x1.25
x+0.3125=0.3125
x=0.3125-0.3125
x=0