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3(x+1) - 2(x-6) ≥ 2x+3
3x + 3 - 2x + 12 ≥ 2x + 3
x + 15 ≥ 2x + 3
12 ≥ x
Cs: (-oo, 12]
3(x + 1) - 2(x - 6) ≥ 2x + 3
3x + 3 - 2x + 12 ≥ 2x + 3
x + 15 ≥ 2x + 3
15 - 3 ≥ 2x - x
12 ≥ x
x≤12
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12
Solucion
(-infinito , 12] Cerrado en 12