5х - 4 · (7х - 9) = 289
5х - 28х + 36 = 289
-23х = 289 - 36
-23х = 253
х = 253 : (-23)
х = -11
Ответ: (-11).
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5х - 4 · (7х - 9) = 289
5х - 28х + 36 = 289
-23х = 289 - 36
-23х = 253
х = 253 : (-23)
х = -11
Ответ: (-11).