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a)18x - 43 = 65
b) 23x - 16 = 14 - 17x
c) x + 4 = 15
d) 2x – 5 = x + 10
e) 2x + 6 = x + 18
f) 5x – 3 = 2x + 9
g) 3(2x – 3) + 2(x + 1) = 3x + 18
h) 2x + 3(x – 5) = 4x + 9
i) 2(x + 1) – 3(2x – 5) = 6x – 3
j) 3x – 5 = x – 2
k) 3x – 5 = 13
l) 3x + 5 = 2
m) x – (2x – 1) = 23
n) 2x – (x – 1) = 5 – (x – 3)
Soluções para a tarefa
Resposta:
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Resposta:
a:
18x = 65 + 43
18x = 108
x = 108/18
x = 6
b:
23x = 14 - 17x + 16
23x + 17x = 30
40x = 30
x = 30/40 = 3/4
c:
10y - 5 - 5y = 6y - 6 -20
5y - 6y = -26 + 5
-y = -21
y = 21
d:
x² + 4x + x² + 2x = 2x² + 12
2x² + 6x = 2x² + 12
Diminuindo 2x² em ambos os lados:
6x = 12
x = 12/6 = 2
e:[2(x - 5) + 4(1 - 2x)] / 20 = 5 (3 - x) / 20
2x - 10 + 4 - 8x = 15 - 5x
-6x - 6 = 15 - 5x
-6x + 5x = 15 + 6
-x = 21
x = -21
f:
4x² + 24x - x² = 5x²
4x² - x² - 5x² = -24x
-2x² = -24x
Dividindo por x em ambos os lados:
-2x = - 24
x = 24/2 = 12
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Explicação passo-a-passo: