Question 1077485
Let the two methods be x and y. Then:
.5x+2y=99
9x+7y=564
So:
9x+36y=1782
9x+7y=564
29y=1218
y=42
x=30
They should refinish 30 tables using the first method, and 42 tables using the second. ☺☺☺☺