Question

1)6-3(х+1)-(7-х) 2)(8х+3)-(10х-6)-9 3)5-2(х-1)-(-4-х) 4)(7х+1)-(9х+3)+5 5)(3,4+2у)-7(у-2,3) 6)4(5х+2)-10(3х-3)+15 7)5,6-3(2-0,4х)-0,4(4х-1) 8)5(х-12)+6(х-10)-(х-1) 9)4(х-1)-2(2х-8)+12 10)8(5-3х)-6(2-4х) 11)7(4х-1)+6-2(3-14х) 12)2(7х-7)-7(2х-3)+(7-х)

Answer 1

2)(8x+3)-(10x+6)=9
8x+3-10x-6=9
-2x=12
x=-6
3)5-2(х-1)=4-х раскрой скобки
5-2х+2=4-х переноси х в одну сторону, а числа в другую
5+2-4=2х-х
3=х
х=3

Answer 2

Let's simplify each expression one by one:

1. 6 - 3(x + 1) - (7 - x) = 6 - 3x - 3 - 7 + x = -4x - 4

2. (8x + 3) - (10x - 6) - 9 = 8x + 3 - 10x + 6 - 9 = -2x

3. 5 - 2(x - 1) - (-4 - x) = 5 - 2x + 2 + 4 + x = -x + 11

4. (7x + 1) - (9x + 3) + 5 = 7x + 1 - 9x - 3 + 5 = -2x + 3

5. (3.4 + 2y) - 7(y - 2.3) = 3.4 + 2y - 7y + 16.1 = -5y + 19.5

6. 4(5x + 2) - 10(3x - 3) + 15 = 20x + 8 - 30x + 30 + 15 = -10x + 53

7. 5.6 - 3(2 - 0.4x) - 0.4(4x - 1) = 5.6 - 6 + 1.2x - 1.6x = -0.4x - 0.4

8. 5(x - 12) + 6(x - 10) - (x - 1) = 5x - 60 + 6x - 60 - x + 1 = 10x - 119

9. 4(x - 1) - 2(2x - 8) + 12 = 4x - 4 - 4x + 16 + 12 = 24

10. 8(5 - 3x) - 6(2 - 4x) = 40 - 24x - 12 + 24x = 28

11. 7(4x - 1) + 6 - 2(3 - 14x) = 28x - 7 + 6 - 6 + 28x = 56x - 7

12. 2(7x - 7) - 7(2x - 3) + (7 - x) = 14x - 14 - 14x + 21 + 7 - x = -7x + 14