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Q: Write an equation for n plus 13 equals 21?

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5

In the equation 3x plus 7 equals 13, x is equal to 2.

Yes that is correct

It is a linear equation with a single variable, y.

It is a linear equation in one variable, x.

It is an equation and the value of x is 2.2

It is an equation and the value of x is 13/3

If: 2a+13 = 5a+1 Then: a = 4

Parallel, the slope of the second equation is 4

It is an equation and the value of y is 18

An equation where q = 240

Well lets write out the problem. 8 plus a (so 8+a) when a equals five (a=5). Since we know that a is the same thing as 5, you can just plug in a into the original equation.8+a turns into 8+5. Then it's just simple arithmetic, 8+5=13. Your final answer is 13.

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