Q: Solution of the equation 2x plus 3 equals 7?

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Not sure what you mean; that equation certainly has a solution.

It does if x=2. That's the solution of your equation.

An equation, solution x = -10

X=2

2x + 4 = 8Subtract 4 from each side of the equation:2x = 4Divide each side by 2:x = 2

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Not sure what you mean; that equation certainly has a solution.

x = 0 and y = 4

It is a linear equation in x. The equation has the solution x = 0.

It does if x=2. That's the solution of your equation.

An equation, solution x = -10

X=2

2x + 4 = 8Subtract 4 from each side of the equation:2x = 4Divide each side by 2:x = 2

the answer is y minus 10 divided by 2.

2x + 4 is an expression, not an equation. There can be no solution set for an expression.

It appears to be a simple linear equation in 'x'. But it has no solution. There is no numerical value for 'x' that can make it a true statement.

-2x plus 3y equals 1

The solution is (x, y, z) = (2.5, 1, 2.5).