exam Maths Puzzle Numerical Ability

whats the answer for this question 3(4-7)-11

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Yuri has a board that is 98 in. long.He wishes to cut the board into two pieces so that one piece will be 10 in. longer that the other. What should the legth of each piece be? solve the system of equations by graphing. Then classify the system as independent, inconsistent, or dependent

x+y=4 x-y=2