3 years ago

Two times the sum of a number 3 is -14

Mathematics

1 answer:

bija089 [108]3 years ago

3 0

n = the number

2(n + 3) is the expression

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Find the length of x. help please !

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Use CPCTC (Corresponding parts of congruent triangles are congruent).

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$\frac{6.5}{5} = \frac{6.5 + 6.5}{x}$

First, simplify. Combine like terms:

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Next, cross multiply.

$5 * x * \frac{6.5}{5} = \frac{13}{x} * x * 5\\x * 6.5 = 13 * 5\\6.5x = 65\\$

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$\frac{5}{6.5} = \frac{x}{13}$

Plug in 10 for x (Your answer). Cross multiply, then simplify:

$\frac{5}{6.5} = \frac{10}{13}$

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$65 = 65$ (True).

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