The student council at sparrowtown high school is making t-shirts to sell for a fundraiser, at a price of $12 apiece. the costs, meanwhile, are $10 per shirt, plus a setup fee of $72. selling a certain number of shirts will allow the student council to cover their costs. how many shirts must be sold? what will the costs be? (algebra 2)

36 shirts and costs $432
step by step:
first make an equation with the amount of sold shirts being equal to cost of making them -
12x=10x+72 where x is the number of shirts
then, subtract 10x from 12x to get the variable on the same side -
2x=72
finally, divide by 2 to isolate x
x=36 shirts
to figure out the cost, substitute 36 for x in 10x+72
10(36)+72= 360+72= $432