Please answer this one question, please don't just answer one part of it.

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.

G. how many different 6-letter arrangements can be formed using the letters in the word absent, if each letter is used only once? a. 6 b. 36 c. 720 d. 46,656

Pleas ! its urgent! what is the value of x? enter your answer in the box. mm