Philip is 4 years older than his brother. The sum of their age is 26. How old is philosophy brother

Ages 11 and 15.

Step-by-step explanation:

Although, I cannot answer this properly due to grammatical errors, I think its safe to say you were referring to the younger brother, whom of which would be 11.

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.