How do you solve 2.25t + 5 = 13.5t + 14?

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?

Which ordered pair is a solution of the equation? 2x+3y=10

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!