4-3x=19+8x x+1=7-x 3x-(-3x+4)=-x-12-3x 4(0,5x+4)=8(4+x)

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Let's solve each of these equations one at a time:

1) 4-3x = 19+8
Combine like terms
4 - 3x = 19 + 8
-3x - 8x = 19 -
-11x = 1
x = -15/11

2) x+1 = 7-
Combine like terms
x + x = 7 -
2x =
x = 3

3) 3x - (-3x + 4) = -x - 12 - 3
Simplify both sides
3x + 3x - 4 = - x - 12 - 3
6x - 4 = -x - 12 - 3
6x - x + 3x = -12 +
8x = -
x = -1

4) 4(0.5x + 4) = 8(4 + x
Simplify both sides
2x + 16 = 32 + 8
-6x = 1
x = -16/
x = -8/3