Question

resolva as seguintes equaçoes
a) 2x - 3 = 15 b ) 3x + 12 = 51
c) 7x - 1 = 13 d ) 4x + 2 = - 18

Answer 1

a)2 x - 3 = 15
2 x = 15 + 3
2 x = 18
x = 18/2
x = 9

b)3 x + 12 = 51
3 x = 51 - 12
3 x = 39
x = 39/3
x = 13

 c)7 x - 1 = 13
7 x = 13 + 1
7 x = 14
x = 14/7
x = 2

d)4 x + 2 = -18
4 x = -18 - 2
4 x -20
x = -20/4
x = -5