Answer:
1) 2x+4(x-1)= 2+4x = x = 3
2) 25 - x = 15 - (3x + 10) = x = -10
3) 4x = 2x + 2x + 5(x-x) = x = any value of x make the equation true
Step-by-step explanation:
1) 2x+4x-4=2+4x
6x-4=2+4x
6x-4+4=2+4x+4
6x=4x+6
6x-4x=4x+6-4x
2x=6
2x/2 = 6/2
x= 3
2) 25-x=-3x+5
25-x-25=-3x+5-25
-x=-3x-20
-x+3x=-3x-20+3x
2x=-20
2x/2 = -20/2
x= -10