1 一、解方程: (1) 3.5Χ+1.8=12.3 (5) Χ+ 52 Χ=21 (6) 54 Χ-52 Χ=21 (7) 3.6Χ÷2=2.16 (8) Χ+ 72 Χ=43 (2) 0.8Χ-4=1.6 (3) 5Χ÷2=10 (4) Χ-0.25Χ=3 (9) Χ- 52 Χ=103 (10) Χ- 52 =103 (11) 2Χ+7Χ=109 (12) 85 -Χ= 52 (13) 107 Χ=2514 (14) 1- 43 Χ=52 (15) 180+6Χ=330 (16)5Χ-Χ=2.4 (17) 2.2Χ-1=10 (18) Χ-0.8Χ=10 (19) 2Χ- 32 Χ=43 (20) 4Χ+Χ=3.15 (21)3.4Χ+1.8=8.6 (22) 75-5Χ=70 (23) 6.6Χ-6Χ=1.8 (24) 330-6Χ=180 2 (25)56=12Χ+8 (26) 1- 32 Χ=43 (27)54-7Χ=5 (28)6Χ-10=8 (29)8- 83 Χ=432 (30)3- 521Χ=109 (31)2(Χ-1)=4 (32) 2(6Χ-2)=8 (33) 5-3Χ=8Χ+1 (34) 2(Χ-2)+2=Χ+1 (35) 3-Χ=2-5(Χ-1) (36) 3Χ=5(32-Χ) (37) 7(4-X)=9(X-4) (38)128-5(2X+3)=73 (39) 1.7X+4.8+0.3X=7.8 (40) 4X÷0.24=100 (41)3(X+1)÷(2X–4)= 6 (42)3X+ 7X +10 = 90 (43)3(X - 12)+ 23 = 35 (44)7X-8=2X+27 (45)5X -18 = 3–2X (46)(7X - 4)+3(X - 2)= 2X +6 (47)80÷X=20 (48)12X+8X-12=28 3 (49)3(2X-1)+10=37(50)1.6X+3.4X-X-5=27(51)2(3X-4)+(4-X)=4X (52)3(X+2)÷5=(X+2) (53)(3X+5)÷2=(5X-9)÷3 (54)X- 27 X= 43 (55)2X + 25 = 35 (56) 70%X + 20%X = 3.6 (57) X×53 =20×41 (58)25% + 10X = 54 (59)X - 15%X = 68(60)X+ 83 X=121 (61) 5X-3×215 = 75 (62) 32 X÷41 =12 (63)6X+5 =13.4 (64)834143X (65) 3X= 83 (66)X÷72 =167 (67)X+ 87 X= 43 (68)4X-6×32 =2 (69) 125 ÷X= 310 (70) 53 X = 7225 4 (71) 98 X = 61 ×5116 (72)X÷ 356 = 4526 ×2513 (73)4X-3 ×9 = 29 (74) 21 X + 61 X = 4 (75)103 X-21×32 =4 (76)2041xx (78)8)6.2(2x (79)6X+5 =13.4 (80) 25 X-13 X= 310 (81) 4X-6=38 (82)5X=1915 (83) 218 X=154 (84) X÷54 = 2815 (85) 32 X÷41 =12 ...