-
Solve the following equations.
25
1'7
3
85
(1) 2,5 1,7x = 0,3x + 8,5
-17x-3x=85-25
60
(3) 0,71x -0,23=0.86x + 0,07
= 7+23
こ 30
-20x=
x
71x86x
-15x
(5) 0,07x + 0,50= 1,13 -0,02x
7x+2x=113 -50
9x=63
100
x = 17
(7) x+0,50= 3,5x +0.25
100-350x25-50
·250-25
(9)
10)
19
2.2x + 10,3 = 0,1x + 1.9
22x= x= 19-103
21x=
- 84
175
(11) 1,75-0,05x = 0.04x + 0.04
-5x-4x=4-175
-9x =
x = 19
(13) 1,1x + 2.4 = -1,9x - 0,6
11x +19x
= -6-24
30=-30
171
x = -|
(15) 3,1x +5A = −20, 0,6x
31x + 6x = -20 - 54
37x =
=-74
x=-2
(17) 0,3x0,33 = -0,82 -0,44
30x +80x = 44+33
1! 0x =~!!₁
(19) 0,8% +0.50= 1,13 -0,04x
80₂ + 4x=113-50
84₂ = 63
XE
21
(2)
52
16
22 4
5,2 1,6x = 22 +0.4x
-16x - 4x = 22-52
-20x
= -30
x=-1²/²/²
(4) 403,6x = 2,1x + 0,2.
-36x21x = 2-4
-57x = -2
2
9
57
I
(6) 11,1-0,9x = 0.1x + 0,1
-9x
= ) - 11/
- 10x = -110
- x
c =
7
(8) 0,7x +4,4 = 1,2x + 0.4
7x-12x = 4-44
5x 40
(10) 0,01x +300,51x - 11,00,
1x - 51x = 1100-300
50x=800
x=-16
237
(12) 23,7 18,4x = 20,4x + 4.3,
184204x
3
43-237
388x
= -194
194
こ ¥97
(14) 0,6x + 0,3 = 1,2x + 0,5
6x -12x = 5-3
-6
= 2
x=-1
(16) 0,02x+0,76 = 0,21x - 0,76
2x-21x=76-76
-19x =0.
x²-0
(18) 0,7x +43 = 1.2x - 4.2
7x 12x=42-43
-5 3-1
===
(20) 0,03x + 30# 0,41x -0,42
3x - 4x =-42-300
-28つく=
-342
こ
x
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