Determine a solução das equações a seguir:
a) 2x - 6 = 2
b) 10x = -80
c) 18 + 5x = 28
d) 4x + 8 = 20
e) 5x - 1 = 4
f) x + 14 = 6
g) 6x - 2 = 8
h) x + 7 = 1
Soluções para a tarefa
Resposta:
a) 2x =2 + 6
2x = 8
x = 8/2
x = 4
b) 10x = -80
x= -80/10
x= -8
c) 18 + 5x = 28
5x=28-18
5x=10
x=10/5
x= 2
d)4x+8=20
4x=20-8
4x=12
x=12/4
x=3
e)5x-1=4
5x=4+1
5x=5
x=5/5
x= 1
f) x + 14 = 6
x = 6 -14
x = -8
g) 6x -2 = 8
6x = 8 + 2
6x = 10
x = 10/6
x = 1.2
h) x + 7 = 1
x = 1-7
x = -6
Resposta:
a) x = 4
b) x = - 8
c) x = 2
d) x = 3
e) x = 1
f) x = -8
g) x = 5/3
h) x = -6
Explicação passo-a-passo:
a) 2x - 6 = 2
2x = 2+6
x = 8/2
x = 4
b) 10x = -80
x = -80/10
x = -8
c) 18 + 5x = 28
5x = 28 - 18
x = 10/5
x = 2
d) 4x + 8 = 20
4x = 20-8
x = 12/4
x = 3
e) 5x - 1 = 4
5x = 4+1
x = 5/5
x = 1
f) x + 14 = 6
x = 6-14
x = -8
g) 6x - 2 = 8
6x = 8+2
x = 10/6
x = 5/3
h) x + 7 = 1
x = 1-7
x = -6