Question

Resolva as equações
a)x+x-4=17-2x+1
b)7 (x - 2) = 5(x + 3)

Answer 1

a)
x + x - 4 = 17 - 2x + 1
2x - 4 = 18 - 2x
2x + 2x = 18 + 4
4x = 22
x =  22  (:2)
      ------
         4  (:2)

x = 11/2
 
b)
7.(x - 2) = 5(x + 3)
7x - 14 = 5x + 15
7x - 5x = 15 + 14
2x = 29
x = 29/2

Answer 2

a) 2x+2x=18+4
4x = 22
x= $\frac{22}{4}$ 
x = $\frac{11}{2}$

b) 7x - 14 = 5x +15
7x-5x=15+14
2x= 29 
x= 29/2