Determine o valor de X.
a) 18 - x = 14
b) x - 6 = 24
c) b + x =18
d) d - x = 14
e) x - 3 =24
f) 14 = 7 + x
g) z = 6 - x
h) 2. (x - 1) = 4
i) 7 (x-3)= 9 (x+1) -38
j) x/2 = x/3 - 2 = 13
k) 3x/4 = 5x/2 - 7/2
Respostas
Resposta:
a) 18 - x = 14
- x = 14 - 18
- x = -4 (-1)
x = 4
b) x - 6 = 24
x = 24 + 6
x = 30
c) b + x =18
x = 18 - b
d) d - x = 14
- x = 14 - d (-1)
x = d - 14
e) x - 3 =24
x = 24 + 3
x = 27
f) 14 = 7 + x
-x = 7 - 14
- x = -7 (-1)
x = 7
g) z = 6 - x
x = 6 - z
h) 2. (x - 1) = 4
2x - 2 = 4
2x = 4 + 2
2x = 6
x = 6:2
x = 3
i) 7 (x-3)= 9 (x+1) -38
7x - 21 = 9x + 9 - 38
7x - 9x = -38 + 9 + 21
-2x = -29 + 9
- 2x = - 20 (-1)
2x = 20
x = 20:2
x = 10
j) x/2 = x/3 - 2 = 13 (mmc = 6)
???????????
k) 3x/4 = 5x/2 - 7/2 (mmc = 4)
3x = 10x - 14
3x - 10x = -14
-7x = -14 (-1)
7x = 14
x = 17: 7
x = 2
Explicação passo-a-passo: