1 一、解方程: (1) 3
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
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
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