Use the following function rule to find f(3). f(x) = 12 – 3x f(3)
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1. sum of numbers is x+y=67, the difference between them is x-y=11
2. it is possible to make up and resolve the system:
1. sum of numbers is x+y=67, the difference between them is x-y=11
2. it is possible to make up and resolve the system: