Question

1-Resolva as equações:
a) 12x - 16 = - 21 + 10x
b)1,9x - 3,6 = x - 10,8
c) 10x (x+1) -5 (x-2) = 70
d) 5 (x+ 2) - 13 = 2 (3x - 1)
e) 7 (2+x) = 5 ( x -1,2 ) - 35
f) 3 (x + 1) - 2 (x - 1) = - ( x + 5 )

Answer 1

Resposta:

a) 12x - 10x= -21 + 16

2x = -6

x = -3

b) 1,9x - x= -10,8 + 3,6

0,9x = -7,2

x= -8