[4225:(3x×+2)]-(305:5)=4 <=> [4225:(3x+2)] - 61 = 4 <=> 4225:(3x+2) = 65 <=> 4225 = 65(3x+2) <=> 3x+2 = 4225:65 <=> 3x+2 = 65 <=> 3x = 63<=> x = 21
