(3+0.2x)/0.2-(0.2+0.03x)/0.01=0.75

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(3+0.2x)/0.2-(0.2+0.03x)/0.01=0.75
(3+0.2x)/0.2-(0.2+0.03x)/0.01=0.75

(3+0.2x)/0.2-(0.2+0.03x)/0.01=0.75
(3+0.2x)/0.2-(0.2+0.03x)/0.01=0.75
(3+0.2x)-(0.2+0.03x)*20=0.75*0.2
3+0.2x-4-0.6x=0.15
-0.4x=1.15
x=-23/8