\(24+3x\left(5-x\right)=27\)
\(3x\left(5-x\right)=27=24=3\)
\(5-x=3:3=1\)
\(x=5-1=4\)
24 + 3 * ( 5 - x ) = 27
27 * ( 5- x ) = 27
5- x = 27 : 27
5 - x = 1
x = 5- 1
x = 4
\(24+3X\left(5-x\right)=27\)
\(3X\left(5-x\right)=27-24\)
\(3X\left(5-x\right)=3\)
\(\left(5-x\right)=3:3\)
\(\left(5-x\right)=1\)
\(x=5-1\)
\(x=4\)