Question

Ayúdame con estas ecuaciones 12(3 x +5+46 =178, 13 ((x-3)=3(2x-1)-1, 20x+4=-x-17

Answer 1

12(3x) + 5 + 46 = 178
36x + 5 + 46 = 178
36x = 178 - 46 - 5
36x = 178 - 51
36x = 127
x = 127/36

13(x - 3) = 3(2x - 1) - 1
13x - 39 = 6x - 3 - 1
13x - 6x = 39 - 3 - 1
7x = 35
x = 35/7
x = 5 

20x + 4 = -x - 17
20x + x = -4 - 17
21x = -21
x = -21/21
x = -1