1、(1) (2) (3) () (4) ()(5)( ) (6) ( ) (7)6.122.88 (8)()(9) ( ) (10) (11) (12) (13) +( ) (14) (15)- + - (16) +- (17) - (- ) (18) (19) (20)-+(21)1+ (22)+ (23) (24)0.85+1.15+ (25) (26) (27) + (28) (29)1 (30) (31) () (32) () (33) () (34) (35) (36) (37) (38) 6 (39) (40) (41)+- (42) () (43)( ) (44)+(45)(+ )
2、 (46)+ (+) (47) (+) (48) +(49) + - + (50)(- ) (51) () (52) (53)2 (54) +(+ ) (55) -(+) (56) + - (57)51(58)(59)() (60)-()(61) (62) (63) (64) 3(65) (66) X-7.7=2.85 5X-3X=68 4X+10=5 320=45+6X X-0.6X=8 x+8.6=9.4 522x15 13x 1.3 X+8.3=19.7 15x 30 3x+936 7(x-2)=7 3x+9=12 18(x-2)=27 12x=320+4x 5.37+x=7.47 15
3、3x=5 30x=85 1.8+2x=6 420-3x=170 3(x+5)=18 0.5x+9=40 6x+3x=36 1.5x+6=3x 53-x=8 40-8x=5 x5=21 48-20+5x=31 x+2x+8=80 200-x5=3070x =4 45.6- 3x =1.6 9.8-2x=3.8 5(x+5)=100 x+3x=70 3(x+3)=50 二、提高类方程。4(4x1)=3(22x) 7(2x-6)=84 5(x-8)=3x 7x-7=6x+4(22-x+2=68x 8x-6x+30=12x+15 7(x+2)=5x+60 240(x7)=30(20-8x)3=2x+1
4、 (6x-40)8=5x-8 128x=3 (21+4x)2=10x+14 8x-156=3x-20 (2x+7)2=4x+144.55.6746.32.42 10(1.673.3) 12.833.420.275.4856.2516.4 3.3752.128 11.836.945.384.296.314.296.31401.77 12.46.06 11.56(8.560.67) 4.632.051.98101.529 5.1465 74.90.2543.8438.43.8461.6 4.61.02 7.5450.15 57.143.516(30.125)8 2.40.2578.78782.5(
5、0.91.8)4.5 98.510.1 6.4323.2 0.2540.254 2.162.1699 6.90.16 4.2260.42740 5.41.250.50.83.9(1.35) 2.57.5(3.641.24)46.246.240.25 5.40.99X5=0.016 4.2X=4.284 15.6X=27 X3.5=4.050.8(1.2512.5) 0.83.21.25 (160.53.2)5 972.545.50.672(22.2) 3.74.54.43.7 2.512.50.4822.8(69.7283.2)0.8(100.34)0.25 25.44.80.652.6 3.81.250.8 6.52.02