17,54+x:3,5=64,16
x:3,5=64,16-17.54
x:3,5=46.62
x=46.62:3.5
x=13.32
(x-1,75):0,01:20=41,25
(x-1,75):0,01=41.25x20
(x-1,75):0,01=825
x-1.75=825x0.01
x-1.75=82.5
x=82.5-1.75
x=80.75
A/
\(17,54+\frac{x}{3,5}=64,16\)
\(\Rightarrow\frac{x}{3,5}=64,16-17,54\)
\(\Rightarrow\frac{x}{3,5}=46,62\)
\(\Rightarrow x=46,62\cdot3,5\)
\(\Rightarrow x=163,17\)
B/ \(\left(x-1,75\right):0,01:20=41,25\)
\(\Rightarrow\left(x-1,75\right):0,01=41,25\cdot20\)
\(\Rightarrow\left(x-1,75\right):0,01=825\)
\(\Rightarrow\left(x-1,75\right)=825\cdot0,01\)
\(\Rightarrow x-1,75=8,25\)
\(\Rightarrow x=8,25+1,75\)
\(\Rightarrow x=10\)
