The larger number L is 11 more or +11 than twice the smaller S number or 2 xx S.
That means L = 2S + 11.
Now 3 times the larger or 3 xx L is 9 more or + 9 than 7 times the smaller or 7S.
That means 3L = 7S + 9.
We can multiply both sides of the first equation by 3 so it will match the second equation for the L term.
3L = 6S +33
We can now substitute the value of 3L into the second equation:
6S + 33 = 7S + 9
Subtract S values from the right side and number values from the right side to bring them across the = sign.
-S = -24
S = 24
Using the first equation to solve for L;
L = 2S + 11
L = 2(24) + 11
L = 59
To check, substitute the values back into the second equation:
3L = 6S + 9
177 = 168 + 9
177 = 177