Q: How many variables are in this number 2 plus x plus y plus 6 plus z plus equals 9?

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It is an equation in three unknown variables.

Inconsistent linear equations in two variables.

You need three independent equations to solve for three unknown variables.

Technically there are no variables in this equation, as 47 minus 25 is equal to x (22)

You can't do that because 12 plus 60 plus 61 equals 173 unless yo take out the twelve but if you can only use the given variables then you cant do that

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y=-3x+6there are 2 variables.

x, y and z are the variables.

4

Since x and y are variables, the sum of 5x and 5y could be literally any number.

It is an equation in three unknown variables.

Inconsistent linear equations in two variables.

You need three independent equations to solve for three unknown variables.

Technically there are no variables in this equation, as 47 minus 25 is equal to x (22)

That depends on the value of the variables (A, B, and C). It can be anything.

A single linear equation in two variables cannot be solved.

you cannot solve this without more information. When 3 variables are involved, you need 2 equations to solve for the answers for both variables.

You can't do that because 12 plus 60 plus 61 equals 173 unless yo take out the twelve but if you can only use the given variables then you cant do that