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解方程(1)3x%2=%5 (2)%5x+2=3x%4 (3)2x%3(10%x)=5 (4)3(x...

(1)3x-2=-5 3x=-3 x=-1(2)-5x+2=3x-4 8x=6 x=3/4(3)2x-3(10-x)=5 5x=35 x=7 (4)3(x-1)=3-(2x+1) 5x=5 x=1(5)1-3(x+1/3)=1/3 3x=-1/3 x=-1/9 (6)1/2x+5=2/3x-6 3x+15=4x-10 x=25 (7)x-3/3=2x+1/5 x-3=6x+3/5 5x=-18/5 x=-18/25 (8)2x-1/2-4X+3/3=1 6x-3-8x-6=6 2x=-15 x=-15/2

(1)3x-2=-5 3X=-5+2 3X=-3 X=-1(2)-5x+2=3x-4 -5X-3X=-4-2 -8X=-6 X=4/3(3)2x-3(10-x)=5 2X-30+3X=5 5X=30+5 X=7(4)3(x-1)=3-(2x+1) 3X

(1)移项得,5x-3x=4,合并同类项得,2x=4,系数化为1得,x=2;(2)去分母得,5(3x+5)=30-2(7-3x),去括号得,15x+25=30-14+6x,移项得,15x-6x=30-14-25,合并同类项得,9x=-9,系数化为1得,x=-1.

(1)移项、得:2x-3x=5+2,合并同类项,得:-x=7,系数化成1得:x=-7;(2)移项,得:-x-3x=4,合并同类项,得:-4x=4,系数化成1得:x=-1;(3)移项,得:5x=9+1,合并同类项,得:5x=10,系数化成1得:x=2;(4)移项,得:-4x=4+8,合并同类项,得:-4x=12,系数化成1得:x=-3.

①方程移项合并得:3x=3,解得:x=1;②方程去括号得:-2x+2=6,移项合并得:-2x=4,解得:x=-2;③去分母得:5x-30=2x,移项合并得:3x=30,解得:x=10;④去分母得:2x+1=16-2(x-1),去括号得:2x+1=16-2x+2,移项合并得:4x=17,解得:x=17 4 .

x=1.5

(1)3x-1=0 x^2=1/3x=±根号1/3(2)x(2x+3)=5(2x+3)2x^2+3x-10x-15=02x^2-7x-15=0(x-5)(2x+3)=0(x-5)=0x=5(2x+3)=0x=-3/2(3)x-4x-2=0x-4x+4=6(x-2)^2=6x-2=±根号6x=2±根号6(4)2x-5x+1=02(x^2-5/2x+25/16)+1-25/8=02(x^2-5/2x+25/16)-17/8=02(x-5/4)^2=17/8(x-5/4)^2=17/16x-5/4=±√(17)/4x=5/4±√(17)/4

3 2/.2 2;3x=5-1/3 2/3 x=11X3*7/.4x=7.2 x=3 5*(X1/3*3/3)=2 5x-5/3=2 5x=2+5/3 5x=11/2 x=7 2X+40%X=7;3 x=14/3x=14/10=7/5 5x=7/5+21/5 x=11/10 5x=3.5 x=0.7 52/3X=1/3*1/

3x-2=5x+33X-5X=3+2-2X=5x=- 5/2 及时采纳.

(1)5x十5=9-3x5x+3x=9-58x=4x=1/2(2)4-3(2-x)=5x4-6+3x=5x2x=-2x=-1(3)3分之(x十1)-2=x-2分之x-12(x+1)-12=12x-3(x-1)2x+2-12=12x-3x+32x-10=9x+37x=-13x=-13/7如果不懂,请追问,祝学习愉快!

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