解不等式、(1.8-8x)/12-(5x-0.4)/3≤(1.3-3x)/2

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解不等式、(1.8-8x)/12-(5x-0.4)/3≤(1.3-3x)/2
解不等式、(1.8-8x)/12-(5x-0.4)/3≤(1.3-3x)/2

解不等式、(1.8-8x)/12-(5x-0.4)/3≤(1.3-3x)/2
1.8-8x-20x+1.6<=7.8-18x
10x>=1.8+1.6-7.8
10x>=-4.4
x>=-0.44

(9-40x)/60-(100x-8)/60≤(39-90x)/60
(9-40x)-(100x-8)≤(39-90x)
9-40x-100x+8≤39-90x
17-140x≤39-90x
17-39≤140x-90x
-22≤50x
x ≥ -4.4

(1.8-8x)/12-(5x-0.4)/3≤(1.3-3x)/2
(1.8-8x)﹣4(5x-0.4)≤6(1.3-3x)
-10x≤4.4
x≥0.44