Question

1) -31 + 8 = 18
2) 2 + 4m = 2m + 8
3) -3 + 2n = 5n + 12
4) 3y = 7y + 8
5) 2x - 7 = x + 1
6) 4x - 9 = 3x + 2
7) 3x - 8 = x + 6
8) 4y + 8 = 2y - 6
9) 3x - 4 = 6x - 19
10) -2 + 2x = 8 - 4x + x me pueden ayudar porfavor​

Answer 1

Explicación paso a paso:

en la 1) te debe faltar algo

2)

$2 + 4m = 2m + 8 \\ 4m - 2m = 8 - 2 \\ 2m = 6 \\ m = 6 \div 2 \\ m = 3$

3)

$- 3 + 2n = 5n + 12 \\ 2n - 5n = 12 + 3 \\ - 3n = 15 \\ n = 15 \div - 3 \\ n = - 5$

4)

$3y = 7y + 8 \\ 3y - 7y = 8 \\ - 4y = 8 \\ y = 8 \div - 4 \\ y = - 2$

5)

$2x - 7 = x + 1 \\ 2x - x = 1 + 7 \\ x = 8$

6)

$4x - 9 = 3x + 2 \\ 4x - 3x = 2 + 9 \\ x = 11$

7)

$3x - 8 = x + 6 \\ 3x - x = 6 + 8 \\ 2x = 14 \\ x = 14 \div 2 \\ x = 7$

8)

$4y + 8 = 2y - 6 \\ 4y - 2y = - 6 - 8 \\ 2y = - 14 \\ y = - 14 \div 2 \\ y = - 7$

9)

$3x - 4 = 6x - 19 \\ 3x - 6x = - 19 + 4 \\ - 3x = - 15 \\ x = 15 \div 3 \\ x = 5$

10)

$- 2 + 2x = 8 - 4x + x \\ - 2 + 2x = 8 - 3x \\ 2x + 3x =8 + 2 \\ 5x = 10 \\ x =10 \div 5 \\ x = 2$