Question

Determine a raiz de cada equação a seguir:
a) X+7=21
b) 17+2a=25
c) 3z-12=-87
d) 4X-12=3
e) -3x-4+x=2+x
f) 2-x+7=x+8-3x+5
g) 5.(x-2)=3.(3x+4)
h) 2.(-2x+3)=(-x-16)

Answer 1

a) x= 21- 7 | x= 14
b)2a=25-17 = 8 | a= 8/2 | a=4
c)3z= -87-12 = -99 | z= -99/3 | z = 33
d)4x= 3+12 = 15 | x= 15/4 | x = 3,75
e)-3x-x-x= 2+4 | -5x= 6 (-1x) | 5x=-6 | x = -6/5 | x= - 1,2
f)-x-x+3x= 2-7-8-5 | x = -18
g)5x-2=9x+12 | 9x - 5x =12+2 | 4x=14 | x=14/4 | x = 3,5
h) -4x+6 = -x-16 | -4x + x = -16 -6 | -3x = -22 (-1x) | 3x = 22 | x = 22/3