We are given:
[tex] \frac{25x}{5}-7x=12 [/tex]
First, let's simplify that fraction. We know that 5 goes into 25 5 times. So we can rewrite the equation as:
[tex] 5x-7x=12 [/tex]
Combine like terms.
[tex] -2x=12 [/tex]
Divide both sides by -2 to get x all by itself.
[tex] \frac{-2x}{-2}=\frac{12}{-2} [/tex]
Simplify
[tex] x=-6 [/tex]
Hope this helps!