Question

resolva as questões a) 14 - 3x = 2x + 9 b)- 2( x - 3 ) = 18

Answer 1

a) 14 - 3x = 2x +9
    14 - 9 = 2x + 3x
     5 = 5x
     x =  $\frac{5}{5}$   x = 1

b) -2 (x - 3) = 18        OBS: -2 . x = 2x | -2 . -3 = 6
    2x + 6 = 18
    2x = 18 - 6
    2x = 12
     x = $\frac{12}{2}$    x = 6
    

Answer 2

a ) 14-3x=2x+9
-3x-2x=9-14
-5x=-5 (-1)
5x=5
x=5/5
x=1

b) -2 (x-3)=18
-2x+6=18
-2x=18-6
-2x=12 (-1)
2x= -12
x=-12/2
x=-6