(49х-8)*х-(3+7х)^2=х-26
49x^2-8x-42x-49x^2-9=x-26
-51x=-17
x=17/51=1/3
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(49х-8)*х-(3+7х)^2=х-26
49x^2-8x-42x-49x^2-9=x-26
-51x=-17
x=17/51=1/3