1. De acordo com o assunto supracitado resolva as equações do 1º grau abaixo:
a) x + 2x - 2x = - 2x + x +48 - 2
b) 5x - X +5 - 4 + x = - 4 + 25
c) 6x - x = 3 + 2 + 40
d) 15x + 8 -2 = 40 + 5x + 8-2
e) X + x + x = -x + x + 52
f) 13x = 3x + 15 +45 - 2 + 2
Soluções para a tarefa
Resposta:
a) x = 23
b) x = 4
c) x = 9
d) x = 4
e) x = 52/3
f) x = 10
Explicação passo-a-passo:
a) x + 2x - 2x = - 2x + x +48 - 2 -> 3x - 2x = -2x + x + 46 -> x = -x +46 ->
x + x = 46 -> 2x = 46 -> x = 46 / 2 -> x = 23
b) 5x - X +5 - 4 + x = - 4 + 25 -> 5x + 1 = + 21 -> 5x = 21 - 1 ->
5x = 20 -> x = 20/5 -> x = 4
c) 6x - x = 3 + 2 + 40 -> 5x = 45 -> x = 45/5 -> x = 9
d) 15x + 8 -2 = 40 + 5x + 8-2 -> 15x + 6 = 46 + 5x -> 15x - 5x = 46 - 6
10x = 40 -> x = 40 / 10 -> x = 4
e) X + x + x = -x + x + 52 -> 3x = 52 -> x = 52/3 -> x = 52/3
f) 13x = 3x + 15 +45 - 2 + 2 -> 13x - 3x = 60 -> 10x = 60 ->
x = 60/10 -> x = 10