Cristian se fue de excursion y gasto 3/10 de dinero que tenia, le queda aún $490.
Gasto y quedo
Fraccion:
Pesos:

He spent

Fraction:  3/10

Weights: $ 210

He stayed

Fraction:  7/10

Weights: $ 490

Step-by-step explanation:

On the excursion Cristian spent 3/10 of what he had, therefore he still has:

1 - 3/10 = 7/10

Now, that 7/10 represents $ 490, to calculate what value 3/10 has, it would be:

(3/10) * 490 / (7/10) = $ 210

In total he had: 210 + 490 = $700

56

Step-by-step explanation:

5x - 5 = 56        Set AC equal to EC since they are congruent

    + 5   + 5        Add 5 to both sides

5x = 61               Divide both sides by 5

x = 12.2

Plug this back into the original equation

5(12.2) - 5 = 56

61 - 5 = 56

56 = 56

The measure of AC is 56.

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