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4 6 3
3x - 6 - 4x - 2 = 2
12 3
3(3x-6-4x-2) = 2 x 12
9x -18 -12x -6 = 24
9x - 12x = 24 + 18 + 6
-3x = 48
x = -16
b.) 13 - 2(y+1) ≤ (y+1) - 8
13 - 2y -2 ≤ (y+1) - 8
11 + 8 - 1 ≤ y + 2y
18 ≤ 3y
y ≥ 18
3
y ≥ 6
2. a. banyak keping uang lima ratusan ada 11
banyak keping uang seribuan ada 19
b. jumlah uang lima ratusan = 11 x 500 = 5.500
jumlah uang seribuan = 19 x 1000 = 19.000 +
jumlah 24.500