解方程
(1)
χ+2.4χ=6
(2)3.5: χ=5:4.2
(3)1.8χ-χ=2.4
(4)
=![]()
(5)6×3-1.8χ=7.2
(6)17-5χ=2.4+3
(7)
=
(8) χ-
χ=![]()
(9)12.6×
-2χ=8
(10)
=![]()
(11)
×
-χ=![]()
(12)
χ+50%=42
(13)4χ-13=31
(14)4.5+8χ=27![]()
(15)2χ+4.3×3=14![]()
(16) χ×(1-
)=1![]()
(17)χ-
χ=![]()
(18)3
÷4χ=2.5
(19)
=![]()
(20)1.6:χ=
:![]()
(21)3χ-16×3=102
(22)x:1
=
:![]()
(23)4χ+7.1=12.5
(24)χ:0.6=
:4
(25)
:
=
:χ
(26) 0.3χ-2=9.1
(27)
=![]()
(28)
x-
=![]()
(29) χ:
=
:![]()
(30)
: χ=
:![]()
(31)3χ+
χ=2![]()
(32)
:
=0.3: χ
(33)131-χ=89.2
(34)
:0.25=80%: χ
(35)4χ+7.1=12.5
(36)
-
χ=![]()
(37)
χ-
χ+
=![]()
(38)
:
=χ:12
(39) χ-
χ=![]()
(40) χ:
=12:3
(41)2.4χ-0.45×2=0.3
(42)
:
=χ:0.1
(43)6.3-5χ=4.1
(44)1.25:5=0.75:χ
(45)
:χ=
:6
(46)
×2.5-χ=0.6
(47) χ-
χ=![]()
(48)
: χ=
:![]()
(49)
=![]()
(50)
χ-
χ+1.2=3.4
(51)4:6=15:χ
(52)
:
=χ:![]()