Question

составьте линейных 5 уравнений и решите их
(по типу такого)​

Answer 1

1)

$4x - 9 = 11x + 5$

$4x - 11x = 5 + 9$

$- 7x = 14$

$x = 14 \div ( - 7)$

$x = - 2$

2)

$0.5(17x - 20) = 3 + 6.5x$

$8.5x - 10 = 3 + 6.5x$

$8.5x - 6.5x = 3 + 10$

$2x = 13$

$x = 13 \div 2$

$x = 6.5$

3)

$\frac{5}{7}x = 5(3x - 20)$

$\frac{5}{7} x = 15x - 100$

$\frac{5}{7} x - 15x = - 100$

$\frac{5}{7}x - \frac{105}{7} x = - 100$

$- \frac{100}{7} x = - 100$

$\frac{100}{7} x = 100$

$x = 100 \div \frac{100}{7}$

$x = 100 \times \frac{7}{100}$

$x = 7$

4)

$8(x - 1) + 2x = 2(4 - 2x)$

$8x - 8 + 2x = 8 - 4x$

$8x + 2x + 4x = 8 + 8$

$14x = 16$

$x = \frac{16}{14} = \frac{8}{7}$

5)

$3(x + 2) + x = 6$

$3x + 6 + x = 6$

$3x + x = 6 - 6$

$4x = 0$

$x = 0$

6)

$2x + 5 = 2(x - 7)$

$2x + 5 = 2x - 14$

$2x - 2x = - 14 - 5$

$0x = - 19$

Решений нет