Explicación paso a paso:
[tex]3(5c + 7) = 5(30 - 7c) \\ 15c + 21 = 150 - 35c \\ - 150 + 21 = - 35c - 15c \\ - 129 = - 50c \\ 50c = 129 \\ c = \frac{129}{50} = 2.58[/tex]
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Explicación paso a paso:
[tex]3(5c + 7) = 5(30 - 7c) \\ 15c + 21 = 150 - 35c \\ - 150 + 21 = - 35c - 15c \\ - 129 = - 50c \\ 50c = 129 \\ c = \frac{129}{50} = 2.58[/tex]