Question

Решите уравнения! 6x+12=4x-45 -3(x+6)=4(x-2) (4x-5)*(2x+9)=0

Answer 1

$6x + 12 = 4x - 45 \\ 6x - 4x = - 45 - 12 \\ 2x = - 57 \\ x = - \frac{57}{2} \\ x = - 28 \frac{1}{2}$
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$- 3(x + 6) = 4(x - 2) \\ - 3x - 18 = 4x - 8 \\ - 3x - 4x = - 8 + 18 \\ - 7x = 10 \\ x = - \frac{10}{7} \\ x = - 1 \frac{3}{7}$
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$(4x - 5)(2x + 9) = 0 \\ 1) 4x - 5 = 0 \\ 4x = 5 \\ x = \frac{5}{4} \\ x = 1 \frac{1}{4} \\ 2)2x + 9 = 0 \\ 2x = - 9 \\ x = - \frac{9}{2} \\ x = - 4 \frac{1}{2}$
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Готово.
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Answer 2

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