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nguyenvanhh
2 năm trước
Tìm x a, x + 2x + x + 91 = -5 b, -152 - (3x + 1) = (-2) . (-27) c, 9x . ( -7 - x) = 0. d, x ² - 7x = 0 e, x + x + x + 81 = -3 - x. f, (-1).(-3).(-6).2. x = 72 g, x ².(x - 7) = 0. h, (x + 3) ².(-6 - 2x) ³ = 0
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