
解一元一次方程专题练习练习题[1][1].doc
13页解一元一次方程的练习题解下列方程:(每题4分)(1)3(x-2)=2-5(x-2) (2) 2(x+3)-5(1-x)=3(x-1) (3) (4) (5) =+1 (6) (7) (8) (9 ) (10) (11) (12) (13) (14) (15) (16) (17) (x-3)=2-(x-3) (18) (19) (20) (21) (22) (23) (24)(3y+7)=2 - y(25)设k为整数,方程kx=4-x的解x为自然数,求k的值。
X- X= 2X + = 70%X + 20%X = 3.6X×=20× 25% + 10X = X - 15%X = 68X+X=121 5X-3×= X÷=126X+5 =13.4 3X=X÷= X+X= 4X-6×=2 ÷X= X = X = × X÷ =× 4x-3 ×9 = 29 x + x = 4X-21×=4 6X+5 =13.4 X-X= 4χ-6=385X= X= X÷=X÷=12 X= X=×X÷=÷ X-0.25= =30% 4+0.7X=102 X+X=42 X+X=105 X-X=400 X-0.125X=8 = X+X=18 X×( + )= x-0.375x= x×+=4× X-X=12 5 X-2.4×5=80.36×5- x = (x- 4.5) = 7 x- 25%x = 10x- 0.8x = 16+6 20 x– 8.5= 1.5 x- x -4= 21 X+25%X=90 X-X= 一、解方程:+-×÷= (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 练习二1、12-3(9-x)=5(x-4)-7(7-x); 2、6x-17=13 3、9-10x=10-9x 4、2(x-1)=4. 5、13x-26=13 6、75-5x=70 7、2(6x-2)=8 8、25x(12-6)=300 9、24x+12=132 10、56=12x+8 11、2x+4=30 12、12x=11x-79 13、13x-12(x+2)=0 14、67-12x=7 15、(x-1)-(3x+2)= - (x-1) 16、18x-16x+18×1+50=70 17、14×(60-x)×2=20x 18、4x+9(x+2)=200 19、100(x+1)+10x+(3x-2)+100(3x-2)+10x+(x+1)=1171 20、5x+4.5(103-x)=486 练习三(1)2x+8=16 (2)x/5=10 (3)x+7x=8 (4)9x-3x=6 (5)6x-8=4 (6)5x+x=9 (7)x-8=6x (8)4/5x=20 (9)2x-6=12(10)7x+7=14 (11)6x-6=0 (12)5x+6=11(13)2x-8=10 (14)1/2x-8=4 (15)x-5/6=7(16)3x+7=28 (17)3x-7=26 (18)9x-x=16(19)24x+x=50 (20)6/7x-8=4 (30)3x-8=30 (31)6x+6=12 (32)3x-3=1 (33)5x-3x=4 (34)2x+16=19 (35)5x+8=19 (36)14-6x=8 (37)15+6x=27 (38)5-8x=4 (39)7x+8=15 (40)9-2x=1 (41)4+5x=9 (42)10-x=8 (43)8x+9=17 (44)9+6x=14 (45)x+9x=4+7 (46)2x+9=17 (47)8-4x=6 (48)6x-7=12 (49)7x-9=8 (50)x-56=1 (51)8-7x=1 (52)x-30=12 (53)6x-21=21 (54)6x-3=6 (55)9x=18 (56)4x-18=13 (57)5x+9=11 (58)6-2x=11 (59)x+4+8=23 (60)7x-12=8 (61)X-5.7=2.15 (62)15.5X-2X=18 (62)3X 0.7=5 (63)3.5×2= 4.2 x (64)26×1.5= 2x (65)0.5×16―16×0.2=4x (66)9.25-X=0.403 (67)16.9÷X=0. 3 (68)X÷0.5=2.6 (69)x+13=33 (70)3 - 5x=80 (71)1.8- 6x=54 (72)6.7x -60.3=6.7 (73)9 +4x =40 (74)0.2x-0.4+0.5=3.7(75)9.4x-0.4x=16.2 (76)12 -4x=20 (77)1/3 x+5/6 x=1.4 (78)12 x+34 x=1 (79)18x-14 x= 12 (80)23 x-5×14 = 14 (81)12 +34 x=56 (82)22-14 x= 12 (83)23 x-14 x= 14 (84)x+14 x= 65 (85)23 x=14 x +14 (86)30 x-12 x -14 x=1 1。
