1. Vamos resolver as seguintes equações do 1° grau:
a) x - 1 = 9
b) x+6=11
c) x+10=6
d) 3x-1=11
e) 2x+5=12
f) 7x=5x-14
g) 8x-6=6x
h) x=8-2x
i) 9x=4+x
j) 11x+3=7x
k) 6x - 11=5x - 3
l) 8x-5 = -2x+1
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Soluções para a tarefa
Resposta:
Explicação passo a passo:
a) x - 1 = 9
x = 1 + 9
x=10
b) x+6=11
x = 11 - 6
x = 5
c) x+10=6
x = 6 - 10
x = -4
d) 3x-1=11
3x = 11 + 1
x = 12/3
x= 4
e) 2x+5=12
2x = 12 - 5
2x = 7
x = 7/2
x = 3,5
f) 7x=5x-14
7x -5x = -14
2x = -14
x = -14/2
x = -7
g) 8x-6=6x
8x -6x = 6
2x = 6
x = 6/2
x = 3
h) x=8-2x
x + 2x = 8
3x = 8
x = 8/3
x = 2,66
i) 9x=4+x
9x - x = 4
8x = 4
x = 4/8
x = 0,5
j) 11x+3=7x
11x - 7x = -3
4x = -3
x = 3/4
x = 0,75
k) 6x - 11=5x - 3
6x -5x = -3 +11
x = 8
l) 8x-5 = -2x+1
8x + 2x = 1 + 5
10x = 6
x = 6/10
x = 0,6
Resposta:
a) x - 1 = 9
x = 9 + 1
x = 10
b) x + 6 = 11
x = 11 - 6
x = 5
c) x + 10 = 6
x = 6 - 10
x = -4
d) 3x - 1 = 11
3x = 11 + 1
3x = 12
x = 12/3
x = 4
e) 2x + 5 = 12
2x = 12 - 5
2x = 7
x = 7/2
f) 7x = 5x - 14
7x - 5x = -14
2x = -14
x = -14/2
x = -7
g) 8x - 6 = 6x
8x - 6x = 6
2x = 6
x = 6/2
x = 3
h) x = 8 - 2x
x + 2x = 8
3x = 8
x = 8/3
i) 9x = 4 + x
9x - x = 4
8x = 4
x = 4/8
j) 11x + 3 = 7x
11x - 7x = -3
4x = -3
x = -3/4
k) 6x - 11 = 5x - 3
6x - 5x = -3 + 11
1x = 8
x = 8/1
x = 8
l) 8x - 5 = -2x + 1
8x + 2x = 1 + 5
10x = 6
x = 6/10
x = 0,6