(1.87+1.955)/0.85-(3*1.75-25)*1.62=(1.87+1.955)/0.85+19.75*1.62=3.825/0.85+19.75*1.62=4.5+3199.5=3204
25-x/1.02=4.2
25-x=4.2*1.02
25-x=4.284
x=25-4.284
x=20.716
144/x-7.6=82.4
144/x=82.4+7.6
144/x=90
x=144/90
x=1,6
(1.87+1.955)/0.85-(3*1.75-25)*1.62=(1.87+1.955)/0.85+19.75*1.62=3.825/0.85+19.75*1.62=4.5+3199.5=3204
25-x/1.02=4.2
25-x=4.2*1.02
25-x=4.284
x=25-4.284
x=20.716
144/x-7.6=82.4
144/x=82.4+7.6
144/x=90
x=144/90
x=1,6