Answer:
y=9
Explanation:
11y=(18)²-(15)²
18 exponent 2 is 324 and 15 exponent 2 is 225.
324-225 = 99 so
11y=99
Now Isolate the variable by dividing by 11 on both sides
11y÷11=99÷11
y =9
Square the terms
11y = 324-225
Subtract
Divide by 11
11y/11 = 99/11
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