解下列方程3(X-1)+5=8 5X-3(X+3)=110-(X+1)=2(X+2) 2(X+1)-3(X-3)=93(
2个回答

3(X-1)+5=8

3x-3+5=8

3x=8-5+3

3x=6

x=2

5X-3(X+3)=1

5x-3x-9=1

2x=1+9

2x=10

x=5

10-(X+1)=2(X+2)

10-x-1=2x+4

9-x=2x+4

9-4=2x+x

5=3x

x=5/3

2(X+1)-3(X-3)=9

2x+2-3x+9=9

-x=9-9-2

-x=-2

x=2

3(Y+2)-6=2+5(Y+2)

3Y+6-6=2+5Y+10

3Y=12+5Y

12=-3Y+5Y

12=2Y

Y=6

2(3X-1)-3(4X+3)=X-4(X-1)

6x-2-12x-9=x-4x+4

(6x-12x)+(-2-9)=-3x+4

-6x-11=-3x-4

-4-11=-3x+6x

-15=3x

x=-5

10X-4(3-X)-5(2+7X)=15X-9(X-2)

10x-12+4x-10-35x=15x-9x+18

(10x+4x-35x)+(-12-10)=6x+18

-21x-22=6x+18

-18-22=6x+21x

-42=27x

x=-42÷27

x=-42/27

行行好!把分给我吧,算得好辛苦!