With this problem im not sure how to subtract something from a number that i dont know x−3x−12x

Drag the tiles to the table. the tiles can be used more than once. nd g(x) = 2x + 5 model a similar situation. find the values of f(x) and g(x) let's say that the functions f(x for the given values of x. fix)=5(4) * g(x) = 2x+5

Anyone know? will mark brainliest if correct!

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?