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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".

The equation soild plus gas equals a liquid

It can be solved by using the quadratic equation formula.

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

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

It is a single linear equation in two unknown variables. It cannot be solved without additional information.

3x + 7 = 46 is an equation. It can be solved as follows: 3x = 39 so x = 13

7h - 2 - 51 is an expression NOT an equation. An expression cannot be solved for the value of a variable.

It is a simultaneous equation and when solved its solutions are x = 71/26 and y = 50/13

It can't be solved because its discriminant is less than zero

It cannot be solved because the discriminant of the quadratic equation is less than zero

It is a linear equation in 2 variables, x and y. It cannot be solved for either x nor y without another, independent equation.

I believe you put in the wrong equation. This equation cannot be solved.

It is a single equation of direct proportionality. It cannot be solved since that would require two linear equations.

x = -1/5 and y = 14/5 Solved by forming a simultaneous equation and eliminating y.

All that you can do is to simplify the left hand side of the "equation" to the expression 2x + 6y + 1. Since the right hand side of the original "equation" is not given, it is, in fact an expression and cannot be solved. In any case, one linear equation in two variables cannot be solved.

There is no equation (nor inequality) to be solved!

(4,-1) solved by turning the information given into a simultaneous equation which worked out as x = 4 and y-1