Question

Задания 2,3,4 даю 41 бал!

6 клас
Хто зробе поставлю п'ять звезд и нажму дякую!

Answer 1

2)

$35 - 7a + 28c = \\ 7 \times 5 - 7 \times a + 7 \times 4c = \\ 7(5 - a + 4c)$

3)

$16m - 12 - 31m + 8 = \\ ( - 12 + 8) + (16 - 31)m = \\ - 4 - 15m$

4)

1)

$5x = 32 + x \\ 5x - x = 32 \\ 4x = 32 \\ x = 32 \div 4 \\x = 8$

2)

$- 3(x - 1) = 24 - 10x \\ - 3x + 3 = 24 - 10x \\ - 3x + 10x = 24 - 3 \\ 7x = 21 \\ x = 21 \div 7 \\ x = 3$

3)

$\frac{x}{8} - \frac{x}{12} = - \frac{1}{3} \: \: | \times 24\\ 3x - 2x = - 8 \\ x = - 8$

4)

$\frac{x - 2.4}{6} = \frac{x + 0.6}{11} \\ 11(x - 2.4) = 6(x + 0.6) \\ 11x - 26.4 = 6x + 3.6 \\ 11x - 6x = 3.6 + 26.4 \\ 5x = 30 \\ x = 30 \div 5 \\ x = 6$