Question

Resolva as equações:

a) 3 - 7(1 - 2x) = 5 - (x + 9)
b) (1 + 3x) - (1 - 2x) + (-11 - 7x) = 5

Answer 1

a)3-7-14x=5-x-9
-14x+x=5-9+7-3
-13x=0. (-1)
13x=0
x=0/13
x=0

B)1+3x-1+2x-11-7=5
3x+2x=5-1+1+11+7
5x=23
x=23/5
x=4,6

Answer 2

a) 7y - 4=10

b) 2t + 1= - 8