Question

1
$9 - 7(x - 3) = 4x$
2
$6x - 15 = 4x + 11$
3
$8x - 11 = 3x + 14$
4
$6 - 8(x + 2) = 3 - 2x$
5
$17 - 12(x + 1) = 9 - 3x$
Даю 35балов!!​

Answer 1

Объяснение:

1.

$9 - 7(x - 3) = 4x \\ 9 - 7x + 21 = 4x \\ 30 - 7x = 4x \\ - 7x - 4x = - 30 \\ - 11x = - 30 \\ x = \frac{30}{11}$

2.

$6x - 15 = 4x + 11 \\ 6x - 4x = 11 + 15 \\ 2x = 26 \\ x = 26 \div 2 \\ x = 13$

3.

$8x - 11 = 3x + 14 \\ 8x - 3x = 14 + 11 \\ 5x = 25 \\ x = 25 \div 5 \\ x = 5$

4.

$6 - 8(x + 2) = 3 - 2x \\ 6 - 8x - 16 = 3 - 2x \\ - 10 - 8x = 3 - 2x \\ - 8x + 2x = 3 + 10 \\ - 6x = 13 \\ x = - \frac{13}{6}$

5.

$17 - 12(x + 1) = 9 - 3x \\ 17 - 12x - 12 = 9 - 3x \\ 5 - 12x = 9 - 3x \\ - 12x + 3x = 9 - 5 \\ - 9x = 4 \\ x = - \frac{4}{9}$