80,6-(7x-7,98)=63,4
80,6-63,4+7,98=7х
25,18=7х
х=3,597
80,6-7x+7.98=63.4
-7x=63.4-80.6-7.98
-7x=-25.18
x=3 418/700
80,6-(7x-7,98)=63,4
80,6-63,4+7,98=7х
25,18=7х
х=3,597
80,6-7x+7.98=63.4
-7x=63.4-80.6-7.98
-7x=-25.18
x=3 418/700