Answer: -7x+2x+5-4x=-9x+6
The equation -7x+2x+5-4x=-9x+6 is an example of an equation that has no solution. This is because the left side of the equation, -7x+2x+5-4x, is not equal to the right side, -9x+6.
When we simplify the left side of the equation, we get -7x+2x+5-4x = -9x. We can see that the left side and right side of the equation are not equal and thus have no solution.
In general, an equation has no solution when the two sides of the equation are not equal, and there is no value of the variable that can make them equal.
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