Найдите корни уравнений 1)(-40.5-39.5)+x=18.3; 2)x+(21.8-30)=1.2; 3)(79.7-100)-x=29;...

Question

Найдите корни уравнений
1)(-40.5-39.5)+x=18.3;
2)x+(21.8-30)=1.2;
3)(79.7-100)-x=29;
4)(-0.28-9.82)-x=-6.11

Answer 1

1)-80+х=18.3
х=80+18.3
х=98.3
2)х+(-8.2)=1.2
х-8.2=1.2
х=8.2+1.2
х=9.4
3)-20.3-х=29
-х=29+20.3
-х=49.3
х=-49.3
4)-10-х=-6.11
-х=-6.11+10
-х=3.89
х=-3.89