322126
18.12.2020 •
Mathematics
3 regular pizzas and 2 small pizzas cost $31.
9 regular pizzas and 8 small pizzas cost $103.
What's the cost of 1 regular pizza?
What's the cost of 1 small pizza?
Solved
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Ответ:
first of all, lets set up the equation
3x + 2y = 31
9x + 8y = 103
+
now make them equal
12x + 8y = 124
9x + 8y = 103
+
x=7
y=5
Ответ: