Объяснение:
1) 20x - 80 - 51 + 34x = 58 + 27
54x = 85 + 80 + 51
54x = 216
x = 4
2) -13.5x - 9 + 8 - 6.4x - 3.1x = 1.3
-23x = 2.3
x = 0.1
Объяснение:
1) 20x - 80 - 51 + 34x = 58 + 27
54x = 85 + 80 + 51
54x = 216
x = 4
2) -13.5x - 9 + 8 - 6.4x - 3.1x = 1.3
-23x = 2.3
x = 0.1