Which items did the chinese receive in trade during the tang dynasty? o a. porcelain and iron o b. paper and jade 0 c. cotton and ivory o d. silk and bamboo

Which items did the chinese receive in trade during the tang dynasty? o a. porcelain and iron o b.

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Ответ:

lee1677

09.09.2021

History

Explanation:

Let the number be equal to .

We know that twice the sum of this number and 4 is the same as the number decreased by 12. Translate this into an equation:

Twice ⇒ multiply by 2Sum ⇒ add the numbersThe same as ⇒ equal signFour times ⇒ multiply by 4Decreased by ⇒ subtract

⇒ 2(x+4)=4x-12

Distribute 2 into the parentheses

2x+8=4x-12

Subtract both sides by 8

$2x+8-8=4x-12-8\\2x=4x-20$

Subtract both sides by 4x

$2x-4x=4x-20-4x\\-2x=-20$

Divide both sides by -2

$\frac{-2x}{-2} = \frac{-20}{-2} \\x=10$

Therefore, the value of the number is 10.

I hope this helps!

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