(1)
35χ+2.4χ=6
(2)3.5: χ=5:4.2
(3)1.8χ-χ=2.4 (4)
10x=2.50.8
(5)6×3-1.8χ=7.2
(6)17-5χ=2.4+315 (7)x1.24=5
(8) χ-14χ=38
(9)12.6×56-2χ=8 (10)x1.2=1.50.6 (11)35×112-χ=5 (12)
23 χ+50%=42
(13)4χ-13=31
(14)4.5+8χ=2712
(15)2χ+4.3×3=1412
(16) χ×(1-38)=123
(17)χ-134χ=8
(18)312÷4χ=2.5 (19)x10.4=.56
(20)1.6:χ=
25:310
(21)3χ-16×3=102
(22)x:1
7119=20:3
(23)4χ+7.1=12.5
(24)χ:0.6=13:4 (25)
23:37=79:χ
(26) 0.3χ-2=9.1 (27)x7=0.63.5 (28)
1112x-4=8 (29) χ: 12=14:18 (30)1112: χ=4:8 (31)3χ+14χ=2213 (32)
5514:7=0.3: χ
(33)131-χ=.2 (34)
13:0.25=80%: χ
(35)4χ+7.1=12.5
(36)34-12χ=15
(37)213χ-2χ+125=3
(38)34:35=χ:12
(39) χ-12χ=710 (40) χ:
34=12:3
(41)2.4χ-0.45×2=0.3 (42)114:8=χ:0.1
(43)6.3-5χ=4.1
(44)1.25:5=0.75:χ (45)132:χ=4:6 (46)35×2.5-χ=0.6 (47) χ-16χ=512 (48)13: χ=15:67 (49)x010=.12
(50)
23χ-12χ+1.2=3.4
(51)4:6=15:χ (52)12:34=χ:23