Question

Vamos resolver as equações do 1º grau corretamente:
1) x + 7 = 10
2) x + 8 = 3
3) 4x = 28
4) 7 = x - 3
5) 2x - 3 = 7
6) x +3 = 8
7) 2x - 3 = 8
8) 3x + 4 = - 9
9) 2x + 5 = x
10) 3x + 8 = 4x
11) 2x - 3 = 10
12) 5x + 2 = 3x - 12
13) 7 - 2x = - 12
14) x - 6 + 3x = - 16
15) 0,3x + 7 = 0,1x + 5

me ajuda por favor

Answer 1

1) x = 10-7

x = 3

2) x = 3-8

x = -5

3) x = 28/4

x = 7

4) 7+3= x

x = 10

5) 2x = 7+3

2x = 10

x = 10/2

x = 5

6) x = 8-3

x= +5

7) 2x = 8+3

2x = 11

x = 11/2

8) 3x = -9-4

3x = -13

x = - 13/3

9) 2x - x= -5

x = -5

10) 3x - 4x = -8

- x = -8

x = 8

11) 2x = 10+3

2x = 13

x = 13/2

12) 5x -3x= -12-2

2x = - 14

x = -14/2

x = -7

13) -2x = -12-7

- 2x = - 19

x = -19/-2

x = + 19/2

14) 4x = -16 +6

4x = -10

x = -10/4

x = - 5/2

15) 0,3x - 0,1x = 5-7

0,2x = -2

x = -2/0,2

x = - 2 ÷ 2/10

x = -2 × 10/2

x = -20/2

x = - 10