Question

A\ 4(x-9)=-2(x+4)


B\ 5x - 13 = 7x - 19


Quem puder ajudar eu

Answer 1

A) 
4.(x - 9) = - 2.(x + 4)
4x - 36 = - 2x - 8
4x + 2x = - 8 + 36
6x = 28
x =  28  (:2)
      ------
         6  (:2

x = 14/3

B)
5x - 13 = 7x - 19
- 13 + 19 = 7x - 5x
6 = 2x
2x = 6
x = 6/2
x = 3

Answer 2

a.
4 (x-9)=-2 (x+4)
4x-36=-2x-8
4x+2x=-8+36
6x=28
x=28/6 ÷2
x=14/3

b.
5x-13=7x-19
5x-7x=-19+13
-2x=-6 . (-1)
2x=6
x=6/2
x=3