Jawabanmu

2014-02-16T17:03:54+07:00
A. komplemen berarti A + B = 90
(2x - 15) + x = 90
3x - 15 = 90
3x = 105
x = 35

b. suplemen berarti A + B = 180
(4x - 15) + (3x + 20) = 180
7x - 5 = 180
7x = 185
x = 25

CMIIW :3