Dining room

The dining room has 11 tables (six and eight seats). In total, there are 78 seats in the dining room. How many are six-and eight-seat tables?

Correct answer:

x =  5
y =  6

Step-by-step explanation:

x+y=11 6x+8y=78  x+y=11 6 x+8 y=78  x+y=11 6x+8y=78  Pivot:Row1Row2 6x+8y=78 x+y=11  Row261 Row1Row2 6x+8y=78 0.33y=2  y=0.333333332=6 x=6788y=6788 6=5  x=5 y=6



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