Question

Resolva as equaçoes (a)4x=-8x+48 (b)2-3[x-(3x+3)]=5[x-(2x-3)] (c) 2(x-5)=2x-5 (d)8-2x=-2x+3x+16

Answer 1

a) 4x+8x=48 ---> 12x = 48 ---> x= 12/48 ---> x = 0,25

b) 2-3 [x-(3x+3)] = 5  ----> -3 [x-(3x+3)] = 5-2 ---> -3 [x-3x-3] = 3 ---->
6x + 9 = 3 ----> 6x = -6 ----> x = -1

c) 2(x-5) = 2x-5 ----> 2x -10 = 2x - 5 ---> 2x - 2x = 10 - 5 ---> 0 = 5 - impossível

d) 8 - 2x = - 2x+3x+16 ---> 8-16 = 2x-2x+3x ----> -8 = 3x ---> x = -8/3 --> x = aprox. 2,67