4x-3=x+12 can anyone pls solve this im new to these type of maths i dont know how to do it

Volume of a cylinder with a radius of 13 in and height of 30 in

Which function families have maximums and minimums? 1.)linear absolute value functions and exponential functions 2.) linear absolute value functions and quadratic functions 3.) linear absolute value functions and linear functions 4.) linear absolute value functions and constant functions

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?