(0.2x+0.5)/0.04+(x-3)/0.6=12x
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(0.2x+0.5)/0.04+(x-3)/0.6=12x(0.2x+0.5)/0.04+(x-3)/0.6=12x(0.2x+0.5)/0.04+(x-3)/0.6=12x(0.2x+0.5)/0.
(0.2x+0.5)/0.04+(x-3)/0.6=12x
(0.2x+0.5)/0.04+(x-3)/0.6=12x
(0.2x+0.5)/0.04+(x-3)/0.6=12x
(0.2x+0.5)/0.04+(x-3)/0.6=12x
=>5x+12.5+0.6x-5=12x
=>6.4x=7.5
=>x=1.171875