What is the solution for the equation for x -10 equals 2x? x equals blank

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

Solve |x| + 7 < 4. you so much to who ever answers this!