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25x + 60x = 1575 | × 1
25x + 25y = 875
25x + 60y = 1575
---------------------------- --
- 35y = - 700
y = - 700
---------
- 35
y = 20
Subtitusi = x + y = 35
x + 20 = 35
x = 35 - 20
x = 15
Semoga membantu..
Jadikanlah jawaban yang terbaik..
Thanks..