There are two ways to solve the problem: set up an equation that relates the two scores
Fabien had 7 points less than two times as many points as Carlos. Fabien had 31 points.
Let C=Carlos' score This means that 31 = 2C-7 Solve for C 2C=31+7=38 C=19. So Carlos had 19 points.
Another way is to calculate the reverse operations in reverse order, - -> + x -> divide Fabien had 7 points less (- -> +) than two times (x2 -> /2)as many points as Carlos. So C=(31+7)/2 =19 as above.
