start with (x) +(x+1)+(x+2)=96
separate numbers from letter which leaves you with x+x+x=96-(2+1)
3x=93
divide both sides by 3 which gives you x=31
then just substitute 31 into each bracket to find the other 2 ages
brother 1 is 31
brother 2 is (31+1)=32
brother 3 is (31+2)=33
and just to make sure u can always check
31+(31+1)+(31+2)=96
96=96