Question

Решите что нибудь но лучше все.
a)(3m - 4m) + (5m+3n)
б)(3b - 11) - 3b + 2)
в) 5+ 3(2y - 7)

#2

a) 2x = 6
б) 8x - 11 =5x - 5
в) 11y - (3y + 12) = 4(2y - 3)


#4

3(2x - 5) = 4(3x + 2)


#5

6(1.2x - 0.5) = 1.3x + 5.9x - 3 

Answer 1

a)   (3m - 4m) + (5m+3n) = 3m - 4m + 5m +3n = 4m+3n

б)(3b - 11) - (3b + 2) = 3b - 11 - 3b - 2 = -13

в) 5+ 3(2y - 7) = 5+ 6y - 21 = 6y - 16

#2

a) 2x = 6
     x = 6/2
     x=3

б) 8x - 11 =5x - 5
    8x-5x = 11 - 5
     3x = 6
      x = 2

в) 11y - (3y + 12) = 4(2y - 3)
     11y - 3y - 12 = 8y - 12
      11y - 3y - 8y = 12-12
       0 = 0

#4

3(2x - 5) = 4(3x + 2)
6x-15 = 12x + 8
6x - 12x = 8 + 15
-6x = 23
x = - 23/6 = -3 5/6 (минус 3 целых пять шестых)


#5

6(1.2x - 0.5) = 1.3x + 5.9x - 3 
7,2х - 3 = 1,3х + 5,9 х - 3
7,2х - 1,3х - 5,9х = -3 + 3
0 = 0