Rezolvați ecuația 3m=4m-14 , 7x=2x+5 , 3x-5=5-2x , 3y-3=-2y+2 , 3b-7b+35=15-2b , 20-3m=2m-8m+50 , -18-3y=-57 , 3x-10=5(x-4) , 3(y-2)=5(y+2) , 6(6n-1)=7(5n-2)​

Răspuns :

1). 3m= 4m-14

3m-4m= -14

-m = -14/*(-1)

. m= 14

2) 7x= 2x+5

7x-2x= 5

5x= 5

x= 5:5

x= 1

3) 3x-5= 5-2x

3x+2x= 5+5

5x= 10

x= 10:5

x= 2

4) 3y-3= -2y+2

3y+2y= 2+3

5y= 5

y= 5:5

y= 1

5) 3b-7b+35= 15-2b

-4b+2b= 15-35

-2b= -20

b= -20:(-2)

b= 10

6) 20-3m= 2m-8m+50

-3m-2m+8m= 50-20

3m= 30

m= 30:3

m= 10

7) -18-3y= -57

- 21 y= -57

y= -57:(-21)

y= 2,71

8) 3x-10= 5(x-4)

3x-10= 5x-20

3x-5x= -20+10

-2x= -10

x= -10:(-2)

x= 5

9) 3(y-2) = 5(y+2)

3y-6= 5y+10

3y-5y= 10+6

-2y= 16

y= 16:(-2)

y= -8

10) 6(6n-1)= 7(5n-2)

36n-6= 35n-14

36n-35n= -14+6

n= -8