11x²/7=67+10
11x²/7=77
11x²=77*7
x²=7*7
x²=49
x1= -7
x2= 7
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11x²/7=67+10
11x²/7=77
11x²=77*7
x²=7*7
x²=49
x1= -7
x2= 7