Paco says that the solution 2over5x - 1 = 9 is x = 4 Do you agree? Explain

Paco is not correct.

Step-by-step explanation:

This is the Equation ... 2/5x-1=9

If Paco is true, you can substitute x=4 into the equation.

If x = 4, [2 / (5*4) ]-1=9

Simplifying this would make it 2/20-1=9

which equals - 9/10=9.

But we know that - 9/10 does not equal 9.

Therefor, Paco's "answer", which is x=4, is not correct.