Por favor me ajudem?
Soluções para a tarefa
Resposta:
1 -
a) x + 5 = 8
x = 8 - 5
x = 3
b) x - 4 =3
x = 3 + 4
x = 7
c) 4 = x - 10
4 + 10 = x
x = 14
d) x - 7 = -7
x = -7 + 7
x = 0
e) x + 9 = -1
x = -1 - 9
x = -10
f) x + 28 = 11
x = 11 - 28
x = -17
g) x - 109 = 5
x = 5 + 109
x = 114
h) x - 39 = -39
x = -39 + 39
x = 0
2-
a) 10 = x + 8
10 - 8 = x
x = 2
b) 15 = x + 20
15 - 20 = x
x = -5
c) 4 = x - 10
4 + 10 = x
x = 14
d) 7 = x + 8
7 - 8 = x
x = -1
e) 0 = x + 12
0 - 12 = x
x = -12
f) -3 = x + 10
-3 - 10 = x
x = -13
3-
a) -x = 9
x = -9
b) -x = -2
x = 2
c) -7x = 14
7x = -14
x = -14/7
x = -2
d) 7x = -14
x = -14/7
x = -2
e) -3x =10
3x = -10
x = -10/3
x = -3,333... (recomendo manter a fração)
f) -5x = -12
5x = 12
x = 12/5
x = 2,4
g) -4x = 8
4x = -8
x = -8/4
x = -2
h) -3x = -9
3x = 9
x = 9/3
x = 3
i) -5x = 15
5x = -15
x = -15/5
x = -3
j) -2x = -10
2x = 10
x = 10/2
x = 5
l) 15 = -3x
-15 = 3x
x = -15/3
x = -5
m) -40 = -5x
40 = 5x
x = 40/5
x = 8
4-
a) 6x = 2x + 16
6x - 2x = 16
4x = 16
x = 16/4
x = 4
b) 2x - 5 = x + 1
2x - x = 1 + 5
x = 6
c) 2x + 3 = x + 4
2x - x = 4 - 3
x = 1
d) 5x + 7 = 4x + 10
5x - 4x = 10 - 7
x = 3
e) 4x - 10 = 2x + 2
4x - 2x = 2 + 10
2x = 12
x = 12/2
x = 6
f) 4x - 7 = 8x - 2
4x - 8x = -2 + 7
-4x = 5
4x = -5
x = -5/4
x = -1,25
g) 2x + 1 = 4x - 7
2x - 4x = -7 - 1
-2x = -8
2x = 8
x = 8/2
x = 4
h) 9x + 9 + 3x = 15
9x + 3x = 15 - 9
12x = 6
x = 6/12
x = 0,5
i) 16x - 1 = 12x + 3
16x - 12x = 3 + 1
4x = 4
x = 4/4
x = 1
j) 3x - 2 = 4x + 9
3x - 4x = 9 + 2
-1x = 11
x = -11
5-
a) 5x - 3 + x = 2x + 9
5x + x - 2x = 9 + 3
6x - 2x = 12
4x = 12
x = 12/4
x = 3
b) 17x - 7x = x + 18
17x - 7x - x = 18
10x - x = 18
9x = 18
x = 18/9
x = 2
c) x + x - 4 = 17 - 2x + 1
x + x + 2x = 17 + 1 + 4
2x + 2x = 18 + 4
4x = 22
x = 22/4
x = 5,5
d) x + 2x + 3 - 5x = 4x - 9
x + 2x - 5x - 4x = -9 - 3
3x - 5x - 4x = -12
8x - 4x = -12
-12x = -12
12x = 12
x = 12/12
x = 1
e) 5x + 6x - 16 = 3x + 2x - 4
5x + 6x - 3x - 2x = -4 + 16
11x - 3x - 2x = 12
8x - 2x = 12
6x = 12
x = 12/6
x = 2
f) 5x + 4 = 3x - 2x + 4
5x - 3x + 2x = 4 - 4
2x + 2x = 0
4x = 0
x = 0/4
x = 0
Espero ter ajudado!!! <3
Bons estudos!!! :D
Resposta:
1 -
a) x + 5 = 8
x = 8 - 5
x = 3
Explicação passo a passo: