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Ostrovityanka [42]

3 years ago

9

Two thirds of a number is equal to 20 what is the number

1 answer:

goldenfox [79]3 years ago

4 0

To solve this problem, we should set up an equation, letting the unknown number be represented by the variable x.

2/3x = 20

To solve this equation, we just have to divide both sides of it by 2/3, because we are trying to get the variable alone on the left side of the equation.

x = 30

Therefore, the number is 30.

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Step-by-step explanation:

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2 years ago

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Anastasy [175]

Answer:

When (-1,-4) is substituted into the second equation, the equation is true.

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Step-by-step explanation:

Given

$x - y = 3$

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Required

What is true about $(x,y) = (-1,-4)$

To do this, we substitute -1 for x and -4 for y in both equations;

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<em>Hence: </em> $(-1,-4)$ <em> is true for </em> $x - y = 3$ <em></em>

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3 years ago