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Question

25-4x=12-5x 13x+27=16x+4,5 21x+45=17+14x 13x+70=2x+15 3,4x-4=4,8-x 2x+7=x+5,5 5-3x=2x-8 9,5x+2=5,7-5,6 1,5x+8=3,1x +16 2,9x+7,4=x+1,7

Answer 1

25-4*x=12-5*x

-4*x+5*x=12-25

x=-13

 

13*x+27=16*x+4.5

13*x-16*x=4.5-27

-3*x=-22.5

x=-22.5/-3

x=7.5

 

21*x+45=17+14*x

21*x-14*x=17-45

7*x=-28

x=-28/7

x=-4

 

13*x+70=2*x+15

13*x-2*x=15-70

11*x=-55

x=-55/11

x=-5

 

3.4*x-4=4.8-x

3.4*x+x=4.8+4

4.4*x=8.8

x=8.8/4.4

x=2

 

2*x+7=x+5.5

2*x-x=5.5-7

x=-1.5

 

5-3*x=2*x-8

-3*x-2*x=-8-5

-5*x=-13

x=-13/-5

x=2.6

 

9.5*x+2=5,7-5.6

9.5*x=5.7-5.6-2

9.5*x=-1.9

x=-1.9/9.5

x=-0.2

 

1.5*x+8=3.1*x +16

1.5*x-3.1*x=16-8

-1.6*x=8

x=8/-1.6

x=-5

 

2.9*x+7,4=x+1.7

2.9*x-x=1.7-7.4

1.9*x=-5.7

x=-5.7/1.9

x=-3

Answer 2

25-4×=12-5×

1×=-25+12=-13

×=-13/1