1)-3Х+51=6
-3Х=-45
Х=15
2) -3Х-21=-3
-3Х=18
Х= -6
1) -3х+51 = 6
-3х = -45
х = 15
2) -3х-21 = 81-84
-3х = -3+21
-3х = 18
х = -6
1)-3Х+51=6
-3Х=-45
Х=15
2) -3Х-21=-3
-3Х=18
Х= -6
1) -3х+51 = 6
-3х = -45
х = 15
2) -3х-21 = 81-84
-3х = -3+21
-3х = 18
х = -6