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15x -5 -11 ≤ 12x -4
15x -16 ≤ 12x -4
15x -12x ≤ -4 +16
3x ≤ 12
x ≤ 4
b. 3 -x > -2x +7
-x +2x > 7 -3
x > 4
Itu jawabannya.
15x-16≤12x-4
15x-12x≤ -4+16
3x≤12
x≤4
b) -x+2x>7-3
x>4