45% of what number is 76?

Pelle's sister is three years older than pelle the father is 5 times as old as pelle the mother was 28 when the sister was born altogether they are 98 years old how old is pelle?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Pls brainliest will be awarded if answer is correct