-4.9-(-х)=-13
х= - 13+4.9
х= - 8.1
х – (-2,7) = 3,8;
Х+2.7=3.8
Х=3.8-2.7
Х=1.1
– 16,7 + х = - 30
Х= -30+16.7
Х= -13. 3
-4.9-(-х)=-13
х= - 13+4.9
х= - 8.1
х – (-2,7) = 3,8;
Х+2.7=3.8
Х=3.8-2.7
Х=1.1
– 16,7 + х = - 30
Х= -30+16.7
Х= -13. 3