Question

1) х + 4 = 48 - 2х
2) 8 – 4х = 2х – 16
3) ) 4(х – 6) = х – 9
4) 6 – 3(х + 1) = 7 – х
5) (8х + 3) – (10х + 6) = 9
6) 7(х – 4) = 5(х + 4)
7) 6х – 12 = 5х + 4
8) 9

7

х + 3 =

3

2

x + 5;
9) 21 · (4 – 6y) = y – 42;
10) (18 - х) – 7(2х – 4) = 5х + 20
СРООООЧНО ПЛИЗ 6 КЛАС ​

Answer 1

1)

$x + 4 = 48 - 2x \\ x + 2x = 48 - 4 \\ 3x = 44 \\ x = 14 \frac{2}{3}$

2)

$8 - 4x = 2x - 16 \\ - 4x - 2x = - 16 - 8 \\ - 6x = - 24 \\ x = 4$

3)

$4(x - 6) = x - 9 \\ 4x - 24 = x - 9 \\ 4x - x = - 9 + 24 \\ 3x = 15 \\ x = 5$

4)

$6 - 3(x + 1) = 7 - x \\ 6 - 3x - 3 = 7 - x \\ - 3x + x = 7 + 3 - 6 \\ - 2x = 4 \\ x = - 2$

5)

$(8x + 3) - (10x + 6) = 9 \\ 8x + 3 - 10x - 6 = 9 \\ 8x - 10x = 9 + 6 - 3 \\ - 2x = 12 \\ x = - 6$

6)

$7(x - 4) = 5(x + 4) \\ 7x - 28 = 5x + 20 \\ 7x - 5x = 20 + 28 \\ 2x = 48 \\ x = 24$

7)

$6x - 12 = 5x + 4 \\ 6x - 5x = 4 + 16 \\ x = 20$

9)

$21(4 - 6y) = y - 42 \\ 84 - 126y = y - 42 \\ - 126y - y = - 42 - 84 \\ - 127y = - 126 \\ y = \frac{126}{127}$

10)

$(18 - x) - 7(2x - 4) = 5x + 20 \\ 18 - x - 14x + 28 = 5x + 20 \\ - x - 14x - 5x = 20 - 28 - 18 \\ - 20x = - 26 \\ x = 1 \frac{3}{10}$