The cost of 3 pizzas and 4 sandwiches at Ralph's Deli is $68. The cost of 3 pizzas and 7 sandwiches is $92. What is the cost of
1 answer:
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Answer:
8
Step-by-step explanation:
let the number be n , then
n + 3 = n - 3 ( multiply through by 4 to clear the fraction )
n + 12 = 4n - 12 ( subtract 4n from both sides )
- 3n + 12 = - 12 ( subtract 12 from both sides )
- 3n = - 24 ( divide both sides by - 3 )
n = 8
That is the number is 8