Question

Знайти х
1) 4/5x+6×(3,1-0,4x)=17
2) -4целых 1/2x+0,75-9,5x=-2,05
расписать надо

Answer 1

4/5x+6×(3,1-0,4x)=17
4/5х + 18.6 - 2.4х = 17
(4/5х=0.8х)
0.8х -2.4х = 17-18.6
-1.6х = -1.6
1.6х = 1.6
х= 1.6 : 1.6
х=1.

-4целых 1/2x+0,75-9,5x=-2,05
4,5х +0.75 - 9.5х = -2.05;
4.5х -9.5х = -2.05 -0.75
-5х = 2.8
х=2.8 : (-5)
х= -0.56