Arianna is 25 years older tha Emma. In 15 years, Arianna will be twice as old as Emma. What will their ages be in 15 years?

2 answers

A=E+25
A+15= 2(E+15)
A, E ages now, add 15 to get new age.
x=x+25 (x+15)2=x+25+15
2x + 30=x + 40
2x-x = 40-30
x=30 = emma
10+25=35 that is arinna