Firstly , Let Rebecca age be R and Steve age be S
Steve is 6 years younger than twice Rebecca age
Since steve is younger, then we will be using subtraction as the order of operation
Since Rebecca age is twice
Then, R x 2
=2R
Steve is 6 years younger than twice of Rebecca age
Mathematically ,
---------------- equation 1
the sum of Steven and Rebecca age is 30
------------------ equation 2
Solve equation 1 and equation 2 simultaneously

Substitute
into equation 2

Collect like terms


Divide both sides by R

PLEASE MARK ME AS BRAINLIEST