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120 y + 15 = 100y + 80
20y=65
y=3 1/4
b. 42x+3=35x+5
7x=2
x=2/7
berikan aku yang terbaik yaa
6y + 6 = 5y + 1
6y - 5y = 1 - 6
y = -5
b. 6x + 3/7 = 5x + 5/7.
42x + 3 = 35x + 5 >>>>>>>>>>> kedua ruas dikali 7
42x - 35x = 5 - 3
7x = 2
x = 2/7