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Q: How do you prove Equation -6z plus 2 equals 3z plus 4z plus 28 solved for z z equals -2?

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this can not be solved un less with another equation

A single linear equation in two variables cannot be solved.

A single linear equation in two variables cannot be solved.

The equation can be solved by isolating the variables from the numbers. The answer would be 4x = 8, which equals 2.

One linear equation in two variables (x and y) cannot be solved.

It is a non-linear equation in x and y. The equation cannot be solved without further information.

Since the second equation is already solved for "y", you can replace "y" by "9" in the other equation. Then solve the new equation for "x".

x = - 4 - or + the square root of 3 Solved by using the quadratic equation formula.

It can be solved by using the quadratic equation formula.

The equation soild plus gas equals a liquid

is an equation of a straight line. It cannot be solved since the solution of an equation with two unknowns (x and y) requires 2 independent equations.

It's a simultaneous equation and can be solved by elimination which works out as:- x = -4 and y = 1

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