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7q -5q = -12
2q = -12
q = -6
2. 7n +4 = 4n -17
7n -4n = -17 -4
3n = -21
n = -7
3. 2(5 -2x) = 3(5 -x)
10 -4x = 15 -3x
-4x +3x =15 -10
-x = 5
x = -5
4. 18 +7x = 2(3x -4)
18 +7x = 6x -8
7x -6x = -8 -18
x = -26
Itu jawabannya.
7q - 5q = -12
2q = -12
q = -6
2. 7n + 4 = 4n - 17
7n - 4n = -4 - 17
3n = -21
n = -7
3. 2 (5 - 2x) = 3 (5-x)
10 - 4x = 15 - 3x
3x - 4x = 15 - 10
-x = 5
x = - 5
4. 18 + 7x = 2 (3 x -4)
18 + 7x = 6x - 8
18 + 8 = -7x + 6x
26 = -x
x = -26