Question

a) 2x + 1 = 12

b) 5. 2x + 4 = 30

Answer 1

a) 2x= 12-1
 
x=11/2

x=5,5

b) 2x=30-4/ 5

2x=26/5

x=5,2/2

x=2,6

Answer 2

a)
2x + 1 = 122x = 12 - 1
2x = 11
x = 11/2

b)
5. 2x + 4 = 30
10x + 4 = 30
10x = 30 - 4
10x = 26
x = 26  (:2)
      ----
      10  (:2)

x =  13
       -----
         5