Question

AРешите уравнения алгебра 7 класс
3,5x-5*0,5-1=0
4x-2*(-1,5)+11=0
2x-17=63+4x
4x+5=2*(x+2)
5x-7=13
3*(x+2)=2*(x+2)
2x-4=8+2x
4x+6=2*(2x+3)
3x+4=7x-8
2x-3=10

Answer 1

Ответ:

Пошаговое объяснение:

3,5x-5*0,5-1=0

3,5x - 2,5 - 1 = 0

3,5x - 3,5= 0

3,5x = 3,5

x = 3,5 : 3,5

x =  1

4x-2*(-1,5)+11=0

4x + 3 + 11 = 0

4x + 14 = 0

4x = -14

x = -14 : 4

x = -3,5

2x-17=63+4x

4x - 2x = -17 - 63

2x = -80

x = -80 : 2

x = -40

4x+5=2*(x+2)

4x + 5 = 2x + 4

4x - 2x = 4 - 5

2x = -1

x = -1 : 2

x = -0,5

5x-7=13

5x = 13 + 7

5x = 20

x = 20 : 5

x = 4

3*(x+2)=2*(x+2)

3x + 6 = 2x + 4

3x - 2x = 4 - 6

x = -2

2x-4=8+2x

2x - 2x = 8 + 4

0 ≠ 12

нет решений

4x+6=2*(2x+3)

4x + 6 = 4x + 6

4x - 4x = 6 - 6

0 = 0

x є (-∞;∞) множество решений

3x+4=7x-8

7x - 3x = 4 + 8

4x = 12

x = 12 : 4

x = 3

2x-3=10

2x = 10 + 3

2x = 13

x = 13 : 2

x = 6,5