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36+12x = 16
48x = 16
x = 3
b. y = 36-15 = 21
2. 16x = 3
16+20x = 3
36x = 3
x = 12
3. 12x + y + 72 = 8x + y
4x = 72
x = 72/4
x = 18
4. 66/6 = 11 soal
5. 3x = 60
x = 60 +75/3
x = 4