Question

resolver las sgtes ecuaciones:
1) 3x + 20 = 5x - 10
2) 3x - 2x + 18 = 30
3) 3x + 10 = 2(x + 10)
4) 3x + 2x = 6x + 54

Answer 1

1) 3x + 20 = 5x - 10
      3x - 5x = -10 -20
       -2x= -30
         x= -30/-2
         x = 15

2) 3x - 2x + 18 = 30
    x = 30 -18
    x = 12

3) 3x + 10 = 2(x + 10)
     3x+10= 2x +20
     3x-2x =20-10
        x = 10

4) 3x + 2x = 6x + 54
     3x+2x -6x = 54
        5x-6x = 54
         -x = 54
         x = -54

Answer 2

1) 3x-5x=-10-20
-2x=-30
X=15

2)3x-2x=30-18
X=12

3)3x+10=2x+20
3x-2x=20-10
X=10

4)3x+2x-6x=54
5x-6x=54
-x=54
X=-54