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4(1/2-1/4 x)+30(1/5x-6/5)≥26x-15(1/2x-1)
2-x+6x-36≥26x-7,5x+15
5x-18,5x≥15+34
-13,5x≥49 /*(-2)
27x≤-98 /:27
x≤ -98/27