(4-6x)/0.01-6.5+(0.02-2x)/0.02-7.5
=(4-6x)/(1/100)-6.5+(0.02-2x)/(2/100)-7.5
=(4-6x)*100-6.5+(0.02-2x)*100/2-7.5
=400-600x-6.5+(2-200x)/2-7.5
=400-600x-6.5+1-100x-7.5
=400-7.5-6.5+1-600x-100x
=400-14+1-600x-100x
=387-700x
(4-6x)/0.01-6.5+(0.02-2x)/0.02-7.5
=(4-6x)/(1/100)-6.5+(0.02-2x)/(2/100)-7.5
=(4-6x)*100-6.5+(0.02-2x)*100/2-7.5
=400-600x-6.5+(2-200x)/2-7.5
=400-600x-6.5+1-100x-7.5
=400-7.5-6.5+1-600x-100x
=400-14+1-600x-100x
=387-700x