Question

cómo despejó las siguientes :

6x + 12 = 7x


2a - 15=-25


4m-2=2m+(m-1)


3y + 8= 2(y-3)


9a + 3 (5-2a) =-3a +11 ​

Answer 1

6x + 12 = 7x
12 = 7x - 6x
12 = x


2a - 15 = - 25
2a = -25 + 15
2a = - 10
a = - 5

4m - 2 = 2m + (m - 1)
4m - 2 = 2m + m - 1
4m - 2 = 3m - 1
4m - 3m = - 1 + 2
m = 1


3y + 8 = 2(y - 3)
3y + 8 = 2y - 6
3y - 2y = - 6 - 8
y = -14

9a + 3 ( 5 - 2a ) = -3a + 11
9a + 15 - 6a = -3a + 11
3a + 15 = -3a + 11
6a = - 4
a = -4/6