Ifs there's a problem like 5x the the second power when x is 2, would i take 5 times 2 then do that to the second power or would i do x to the second then times that by 5

What does x = in this equation x+3+2x=x+5

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?