Question

Найдите корни уравнений:
2) -х+(-5,16)=6,01;
4) -х+(-5,88)=-77,1;
6) -х+(-22 1/4)=-30,2;
8) -х+(-5,5)=-17 1/7;
10) -10 3/7-х=-9 2/3;
12) 40 5/9-х=63 4/5.

Answer 1

a) х+4/15=2/3+2/5
x+4/15=10/15+6/15
x+4/15=16/15
x=16/15-4/15
x=12/15=4/5

б) (4/5-х) +13/20=25/30
(48/60-х) +39/60=50/60
48/60-х=50/60-39/60
48/60-х=11/60
х=48/60-11/60
х=37/60

в) у-5/20=5/8-3/10
у-10/40=25/40-12/40
у-10/40=13/40
у=13/40+10/40
у=23/40

г) 2/3-(7/9-а) =1/3
6/9-(7/9-а) =3/9
7/9-а=6/9-3/9
7/9-а=3/9
а=7/9-3/9
а=4/9