What is the value of x? enter your answer in the box. x = an equilateral triangle l m n with horizontal base m n and vertex l is above the base. sides l m and m n and n l are labeled with single tick mark. angle l n m is labeled as left parenthesis 7 x minus 3 right parenthesis degrees. angle l m n is labeled as left parenthesis 11 y plus 5 right parenthesis degrees.

x=9

Step-by-step explanation:

Since the triangle is an equilateral, we know that all sides, and in turn angles are equal. The interior angle for an equilateral triangle is 60 degrees. Since we are looking for what x equals, we plug the 60 into that equation.

7x-3=60

When solved, you get x=9.

4th option is correct xy=-10

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step-by-step explanation: