Question

6) 3x+4=7x-8; 7) 2x - 3=10 : 8) 2(x+1) =3(х+1) 9) 3x - 5 = 3 + 3x; 10) 3x + 6 = 3(x + 2). 11) 5x+1=3х+й 12) 6x-1=11: 18) x-1 =7(x-1); 14) x-2=1 + 4x: 15) 5x + 5=5(x - 1)

Answer 1

Ответ:

6)3x-7x=-4-8

-4x=-12

X=3

7)2x=3+10

X=13:2

X=7.5

8)2x+3=3x+3

2x-3x=-3+3

-x=0

9)3x-3x=5+3

X=8

10)3x+6=3x+6

3x-3x=-6+6

=0

11)??

12)6x=12

X=2

18)x-1=7x-7

X-7x=1-7

-6x=-6

X=1

14)-3=-x+4x

-3=3x

X=-1

15)5x+5=5x-5

5x-5x=-5-5

0x=-10

Answer 2

Ответ:

6) x = 3 7) x = 6,5  8) x=-1  9) нет 10 ) любое число 11) 2x = ? - 1 12) x=2 18) x=1 14) x = -1 15) нет иксов

Пошаговое объяснение:

6) 4x = 12

7)2x = 13

8) 2x+2=3x+3

9) нет иксов (-5 != 3)

10) 6 = 6

11) 2x = ? - 1 (й  это что ?)

12)6x= 12

18) 6x=6

14) 3x=-3

15) 5 != -5

Answer 3

Let's solve each of the given equations:

6. 3x + 4 = 7x - 8: Subtract 3x from both sides: 4 = 4x - 8 Add 8 to both sides: 12 = 4x Divide both sides by 4: x = 3

7. 2x - 3 = 10: Add 3 to both sides: 2x = 13 Divide both sides by 2: x = 6.5

8. 2(x + 1) = 3(x + 1): Distribute on both sides: 2x + 2 = 3x + 3 Subtract 2x from both sides: 2 = x + 3 Subtract 3 from both sides: -1 = x

9. 3x - 5 = 3 + 3x: Subtract 3x from both sides: -5 = 3 The equation is inconsistent since -5 is not equal to 3. Therefore, there is no solution for this equation.

10. 3x + 6 = 3(x + 2): Distribute on the right side: 3x + 6 = 3x + 6 Subtract 3x from both sides: 6 = 6 The equation is true for all values of x. Therefore, it is an identity and there are infinitely many solutions.

11. 5x + 1 = 3x + y: This equation cannot be solved without knowing the value of y.

12. 6x - 1 = 11: Add 1 to both sides: 6x = 12 Divide both sides by 6: x = 2

13. x - 1 = 7(x - 1): Distribute on the right side: x - 1 = 7x - 7 Subtract x from both sides: -1 = 6x - 7 Add 7 to both sides: 6 = 6x Divide both sides by 6: x = 1

14. x - 2 = 1 + 4x: Subtract x from both sides: -2 = 1 + 3x Subtract 1 from both sides: -3 = 3x Divide both sides by 3: x = -1

15. 5x + 5 = 5(x - 1): Distribute on the right side: 5x + 5 = 5x - 5 Subtract 5x from both sides: 5 = -5 The equation is inconsistent since 5 is not equal to -5. Therefore, there is no solution for this equation.

In summary: 6) x = 3

7. x = 6.5
8. x = -1
9. No solution
10. Infinitely many solutions
11. Cannot be solved without knowing the value of y
12. x = 2
13. x = 1
14. x = -1
15. No solution