Can someone please solve these two questions, Thank you!!!

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

Need same math paper but the back now i hope your able to read it cleary i need with hw