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Sagot :
Let soups be represented by x and sandwiches by y.
x + y = 18
4.5x + 7.75y = 113.50
x = 18 - y
4.5(18 -y) + 7.75 y = 113.5
= 81 - 4.5y + 7.75y = 113.5
81 + 3.25y = 113.5
3.25y = 32.5
y = 10.
x + y = 18
x + 10 = 18
Thus, x = 8.
Thus, 8 soups and 10 sandwiches were ordered.
x + y = 18
4.5x + 7.75y = 113.50
x = 18 - y
4.5(18 -y) + 7.75 y = 113.5
= 81 - 4.5y + 7.75y = 113.5
81 + 3.25y = 113.5
3.25y = 32.5
y = 10.
x + y = 18
x + 10 = 18
Thus, x = 8.
Thus, 8 soups and 10 sandwiches were ordered.
Let the soup be x and sandwich be y
7.75x+4.50y=113.50
x=18-y
7.75(18-y)+4.50y=113.50
y=10
x+y=18
so x=8
7.75x+4.50y=113.50
x=18-y
7.75(18-y)+4.50y=113.50
y=10
x+y=18
so x=8
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