1、解一元一次方程的練習題(2) 2(x+3)-5(l-x)=3(x-l)解下列方程：(每題4分) (1)3 (x-2) =2-5(x-2),頁腳(3) 3(x + l) - 2(x + 2) = 2x + 3(4) 3(x-2) + l = x-(2x-l)2x 1 x+2(6)(8)43-1.2x = x-125,、31(9 ) a-0.4 = -x + 0.342(10)=25(11)中=2+57(12)6x =x+4(13)1 m 3 3iri24-(14) ，- - = 2-空2 25(15) x(16)(17) - (x-3)=2-l (x-3)22(會-冒=3(19)含-需=3(20

2、)(21)三二 =匕(22)23(24) y(3y+7)=2 - -yI I?(23) -x-(x-l) = -(x-l)乙乙J(25)設k為整數，方程kx=4-x的解x為自然數，求k的值。70%X + 20%X = 3.62 - 5+2X3 - 4x=2 - 7XX =20 X 425% + 10X =-X - 15%X = 685453X+-X=1215X-3X =-21-X-r-=128217346X+5 =13.43133X=-73X+-X=-842 4X-6X-=23X-r12 .25 X 二二7251"xU35 45254l3 X9 = 2932X-21X-=410x +

3、 x = 2042(x 2.6) = 86X+5 =13.44 x-6=382115X4- =51528325X=572-X=- X 9651x4=26 二 1345 25X-0. 254v =30% 44+0. 7X=102-X+-X=42X+-X=105324X-X=4008X-0.125X=836 = 3¥ " 43 - 2ITx-0. 375x=- 63X-X=1275 X-2. 4X5 = 82 13xX- + -=4X-3 28330. 36X5- T x = t452 ,、金 (x- 4. 5) = 7J1-x- 25%x = 10乙x- 0. 8x = 16

4、+620 x - 8. 5= 1.54x二 x 4= 21X+25%X=90一、解方程：HX4 =(1) 3.5X4-1.8 = 12.3(5) X+-X = 21(6) -X+-X=-rrre(7) 3. 6X4-2 = 2. 16(8) X+-X=-(2) 0. 8X-4 = 1.61 I(3) 5X4-2=10(4) X-0. 25X = 3(9) X-X= ) II(10) x- = 5 M(11) 2X + 7X= !(1(12)L+x=)1 5(13) X= II6(14) -X=-1 1(15)-X=101(16) 180 + 6X = 330(17) 2. 2X-l = 10(

5、18) X-0. 8X=10,頁腳(19) 15X4-2 = 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練習二3.9-10x=10-9x1、12-3(9-x)=5(x-4)-7(7-x) ；2、6x-17=134.2(x-l)=45 J3x-26=136、75 5x=707、2 (6x-2) =88、25x (12-6)=3009、 24x+12=13210、 56=12x+8Ik 2x+4=3012、12x=llx-7913. 13x-12(x+2)=014. 67-12x

6、=715、(x-1) - (3x+2) = " (xT)16 J8x-16x+18X 1+50=7017 J4X(60-x)X2=20x18.4x+9 (x+2)=20019、 100 (x+1) +10x+ (3x-2) +100 (3x-2) +10x+ (x+1) =117120、5x+4. 5 (103-x) =486練習三(2)x/5=10(3)x+7x=8(l)2x+8=16,頁腳(4)9x-3x=6(5)6x-8=4(6)5x+x=9(7)x-8二6x(8)4/5x=20(9)2x-6=12,頁腳(10)7x+7=14(ll)6x-6=0(12)5x+6=ll(13)2

7、x-8=10(14)l/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=l(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,頁腳(40)9-2x=l(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)7

8、x-9=8(50)x56=1(51)8-7x=l(52)x-30=12(53)6x-21=21(54)6x-3=6(55)9x=18(56)4x-18=13(57)5x+9=ll(58)6-2x=ll(59)x+4+8=23(60)7x-12=8,頁腳(61)X-5. 7=2. 15(62)15. 5X-2X=18(62) 3X 0. 7=5(63)3.5X2= 4. 2 x(64)26X1.5= 2x(65)0.5X16-16X0. 2=4x(66)9. 25-X=0. 403(67) 16. 94-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=L4(78) 12 x + 34 x=l(7