Question

(x+7,2)*4,2 = 30,996

Answer 1

(х+7,2)*4,2=30,996
х+7,2=30,996:4,2
х+7,2=7,38
х=7,38-7,2
х=0,18

Answer 2

It seems you have provided an equation, but it's unclear what you want to solve for. The equation you provided is written as:

(4x + 28, 2) = 30,996

However, it looks like there might be a typo or a missing piece of information, as (x + 7, 2) does not form a valid mathematical expression. Please clarify the equation or the unknown variable you want to solve for, and I'll be happy to assist you further.