Question

1) 7x - 4 = x - 16 2) 13 - 5x = 8 - 2x3) 0,2(x - 3) – 1 = 0,5(x +3) – 0,44) 12 = (7x - 9) - (11 - x)​

Answer 1

Ответ:

Пошаговое объяснение:

7х-х=-16+4

6х=-12

х=-12:6

х=-2

13 - 5x = 8 - 2x

-5x + 2x = 8 - 13

-3x = -5

x = -5 : (-3)

x = 5/3

x = 1 2/3

0,2(х-3)-1 = 0,5(х+3)-0,4

0,2х-0,6-1 = 0,5х+1,5-0,4

0,2х-0,5х = 1,5-0,4+0,6+1

-0,3х = 1,35

х= 2,7 / (-0,3)

х= -9

12=(7x-9)-(11-x)

12=7x-9-11+x

12+20=8х

8х=32

х=32:8

х=4

Answer 2

Ответ:

1)17х-4=х-16

17х-х=16+4

16х=-12

4/3

Answer 3

It looks like you have provided a set of equations. I can help you solve them one by one:

1. $7x - 4 = x - 16$ Subtract $x$ from both sides: $7x - x - 4 = -16$ Simplify: $6x - 4 = -16$ Add 4 to both sides: $6x = -12$ Divide by 6: $x = -2$

2. $13 - 5x = 8 - 2x$ Add $5x$ to both sides and subtract 8 from both sides: $13 - 8 = 5x - 2x$ $5 = 3x$ Divide by 3: $x = \frac{5}{3}$

3. $0.2(x - 3) - 1 = 0.5(x + 3) - 0.4$ Distribute the constants and simplify each side: $0.2x - 0.6 - 1 = 0.5x + 1.5 - 0.4$ Combine like terms: $0.2x - 1.6 = 0.5x + 1.1$ Subtract $0.2x$ from both sides: $-1.6 = 0.3x + 1.1$ Subtract 1.1 from both sides: $-2.7 = 0.3x$ Divide by 0.3: $x = -9$

4. $12 = (7x - 9) - (11 - x)$ Distribute the negative sign and simplify each side: $12 = 7x - 9 - 11 + x$ Combine like terms: $12 = 8x - 20$ Add 20 to both sides: $32 = 8x$ Divide by 8: $x = 4$

So, the solutions for the given equations are:

1. $x = -2$
2. $x = \frac{5}{3}$
3. $x = -9$
4. $x = 4$