解方程,打出来给25分5(2x-2)-4x=7(x-2) 2(3x-1)=5x+2 (9-7x)*3=2x-42 73x
3个回答

5(2x-2)-4x=7(x-2)

10x-10-4x=7x-14

(10-4-7)x=10-14

-x=-4

x=4

2(3x-1)=5x+2

6x-2=5x+2

(6-5)x=2+2

x=4

(9-7x)*3=2x-42

27-21x=2x-42

-21x-2x=-42-27

-23x=-69

x=3

73x-67+84x-14=76

(73+84)x=76+67+14

157x=157

x=1

92x-38-(47x+88)=324

(92-47)x=324+38+88

45x=450

x=10

15-(7-5x)=2x+14-3x

15-7+5x=-x+14

(5+1)x=14-8

6x=6

x=1

8x-7x(3-x)=(2x-4)*5+4

8x-21+7x=10x-20+4

15x-10x=21-16

5x=5

x=1

16x-(4+3x)=9(x+4)

16x-3x-4=9x+36

13x-9x=36+4

4x=40

x=10

87-(3x+16)=2x+11

87-3x-16-2x=11

-5x=11-71

x=12

(5x+1)*2=(18-x)*3

10x+2=54-3x

10x+3x=54-2

13x=52

x=4

57-(24x-15)*2=3x+36

57-48x+30=3x+36

-48x-3x=36-87

-51x=-51

x=1