Question

СРОЧНО УРАВНЕНИЕ (2-9)

Answer 1

Ответ:

$- 8x = 3.2 \\ - x = 3.2 \div 8 \\ - x = 0.4 \\ x = - 0.4$

$\frac{2}{3} x = 6 \\ x = 6 \div \frac{2}{3} \\ x = 6 \times \frac{3}{2} \\ x = 9$

$4 - 5x = 0 \\ - 5x = 0 - 4 \\ - 5x = - 4 \\ x = \frac{4}{5}$

$10x + 7 = 3 \\ 10x = 3 - 7 \\ 10x = - 4 \\ x = - 4 \div 10 \\ x = - 0.4$

$3 - 4x = x - 12 \\ - 4x - x = - 12 - 3 \\ - 5x = - 15 \\ x = 15 \div 5 \\ x = 3$

$(x + 7) - (3x + 5) = 2 \\ x + 7 - 3x - 5 = 2 \\ x - 3x = 2 - 7 + 5 \\ - 2x = 0 \\ x = 0 \div ( - 2) \\ x = 0$

$3(2x - 1) + 12 = x \\ 3 \times 2x + 3 \times ( - 1) + 12 = x \\ 6x - 3 + 12 = x \\ 6x + 9 = x \\ 6x - x = - 9 \\ 5x = - 9 \\ x = - 9 \div 5 \\ x = - 1 \frac{4}{5}$

$\frac{x}{3} + \frac{x}{4} = 7 \\ \frac{x \times 4 + x \times 3}{12} = 7 \\ \frac{4x + 3x}{12} = 7 \\ \frac{7x}{12} = 7 \\ 7x = 12 \times 7 \\ 7x = 84 \\ x = 84 \div 7 \\ x = 12$