Respuesta:
x-3(2x-7)≤3(x+1)-4(x+5)
x-6x+21≤3x+3-4x-20
-5x+21≤-x-17
-5x+x≤-x-17
-4x≤-38
x ≥19/2
x∈ [19/2,+∞>
b)3(x+1)+12>2x+5(x-1)
3x+3+12>2x+5x-5
3x+15>7x-5
3x-7x>-5-15
-4x>-20
x<5
x∈ <-∞,5>
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Respuesta:
x-3(2x-7)≤3(x+1)-4(x+5)
x-6x+21≤3x+3-4x-20
-5x+21≤-x-17
-5x+x≤-x-17
-4x≤-38
x ≥19/2
x∈ [19/2,+∞>
b)3(x+1)+12>2x+5(x-1)
3x+3+12>2x+5x-5
3x+15>7x-5
3x-7x>-5-15
-4x>-20
x<5
x∈ <-∞,5>