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(1) 3.5X+1.8=12.3 (5) X+X=21 (6) X+X=
(7) 3.6X÷2=2.16 (8) X+X= (2) 0.8X-4=1.6
(3) 5X÷2=10 (4) X-0.25X=3 (9) X-X=
(10) X-= (11) 2X+7X= (12) +X=
(13) X= (14) X= (15) X=10
(16) 180+6X=330 (17) 2.2X-1=10 (18) X-0.8X=10
(19) 15X÷2=60 (20) 4X+X=3.15 (21)3.4X+1.8=8.6
(22) 5X-X=2.4 (23) 1.5X-X=1 (24) 6.6X-6X=1.8
(25) 2X-X= (26)χ+2.4χ=6 (27)3.5: χ=5:4.2
(28)1.8χ-χ=2.4 (29)= (30)6×3-1.8χ=7.2
(31)17-5χ=2.4+3 (32)= (33) χ-χ=
(34)12.6×-2χ=8 (35)= (36)×-χ=
(37) χ+50%=42 (38)4χ-13=31 (39)4.5+8χ=27
(40)2χ+4.3×3=14 (41) χ×(1-)=1 (42)χ-χ=
(43)3÷4χ=2.5 (44)= (45)1.6:χ=:
(46)3χ-16×3=102 (47)x:1=: (48)4χ+7.1=12.5
(49)χ:0.6=:4 (50):=:χ (51) 0.3χ-2=9.1
(52)= (53)x-= (54) χ: =:
(55): χ=: (56)3χ+χ=2 (57):=0.3: χ
(58)131-χ=89.2 (59):0.25=80%:χ (60)4χ+7.1=12.5
(61)-χ= (62)χ-χ+= (63):=χ:12
(64) χ-χ= (65) χ:=12:3 (66)2.4χ-0.45×2=0.3
(67):=χ:0.1 (68)6.3-5χ=4.1 (69)1.25:5=0.75:χ
(70):χ=:6 (71)×2.5-χ=0.6 (72) χ-χ=
(73): χ=: (74)= (75)χ-χ+1.2=3.4
(76)4:6=15:χ (77):=χ: (78) X÷=
(79)6X+5 =13.4 (80) (81) 3X=
(82)X÷= (83)X+X= (84) 4X-6×=2
(85)÷X= (86) X = (87) X = ×
(88)X÷ =× (89)4x-3 ×9 = 29 (90)x + x = 4
(91)X-21×=4 (92) (93)
(94)6X+5 =13.4 (95)X-X= (96) 4χ-6=38
(97)5X= (98)X= (99)X×=20×
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