Resposta:
Olá!
a)
15 / 5 = 20 / x
15x = 20
x = 20/15
x = 4/3
b)
x / 1 = 3/2
3x = 2
x = 2/3
c)
18(4x + 1) = 16 (x + 2)
72x + 18 = 16x + 32
72x - 16x = 32 - 18
56x = 14
x = 14/54
x = 7/27
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Resposta:
Olá!
a)
15 / 5 = 20 / x
15x = 20
x = 20/15
x = 4/3
b)
x / 1 = 3/2
3x = 2
x = 2/3
c)
18(4x + 1) = 16 (x + 2)
72x + 18 = 16x + 32
72x - 16x = 32 - 18
56x = 14
x = 14/54
x = 7/27