Question

determine a raiz de cada equação a seguir:
a) x - 17= 9 b) 3 x + 2 = 2 x -11 c) 3 (x+2)+5=x+12
d) 9 x - 2 x= 31-3

Answer 1

a) x - 17= 9 ==>x=17+9=26

 b) 3 x + 2 = 2x -11   ==>x=-13 

c) 3 (x+2)+5=x+12   ==>3x+6+5=x+12 ==>2x=1 ==>x=1/2

d) 9 x - 2 x= 31-3  ==>7x=28  ==>x=4