−
1
⋅
2
5
+
2
−
1
⋅
5
4
+
4
+
1
2
0
=
4
−
x{\color{#c92786}{-1}} \cdot {\color{#c92786}{\frac{2}{5}}}+2x-1 \cdot \frac{5}{4}+4x+\frac{1}{20}=4-x
x−1⋅52+2x−1⋅45+4x+201=4−x
−
2
5
+
2
−
1
⋅
5
4
+
4
+
1
2
0
=
4
−
x-2/5+2x-5/4+4x+1/20=4-x
х+2х+4х-2/5⁽⁴-5/4⁽⁵+1/20=4-х
7х-8/20-25/20+1/20=4-х
7х-32/20=4-х
7х+х=4+32/20
8х=4 32/20
х= 4 32/20:8/1
х=7/10
