OPGAVEN
1. Los op:   2x - 4 = 5x + 7
2. Los op:  4 - (x - 3) = 2x

OPLOSSING
1. 2x - 4 = 5x + 7
Þ  2x = 5x + 7 + 4 = 5x + 11
Þ  2x - 5x = -3x = 11
Þ  x = 11/-3 =
-32/3
2. 4 - (x - 3) = 2x
Þ  4 - x + 3 = 2x
Þ  7 - x = 2x
Þ  -x - 2x = -7
Þ  -3x = -7
Þ  x = -7/-3 =
21/3