(1,25 + 3 + 0,75 ) x ( x - 2 ) = 25
5 x ( x- 2) =25
=> x-2=25:5=5
x=3
\(\left(125\%+3\frac{3}{4}\right)\times\left(x-2\right)=25\)
=>\(\left(\frac{5}{4}+\frac{15}{4}\right)\times\left(x-2\right)=25\)
=>\(\frac{20}{4}\times\left(x-2\right)=25\)
=>\(5\times\left(x-2\right)=25\)
=>\(x-2=25:5\)
=>x-2=5
=>x=5+2
=>x=7