Question

1- Resolva a equação

A) 2 ( x + 4 ) = 2 -5 ( 2 + 6x ) +18


B) 4 ( x + 8 ) = 4 -9 ( 2 + 7x ) +20


C) 5x +9 = x -5


(Com cálculo por favor)

Answer 1

a) 2(x+4)=2-5(2+6x)+18
2x+8=2-10-30x+18
2x+8=10-30x
2x+30x=10-8
32x=2
x=1/16

b)4(x+8)=4-9(2+7x)+20
4x+32=4-18-63x+20
4x+32=6-63x
4x+63x=6-32
67x=-26
x=-26/67
x0,38806

c)5x+9=x-5
5x-x=-5-9
4x=-14
x=-7/2
x=-3 1/2,x=-3,5

espero ter ajudado