1) 2.5
2) 3
3) 3.5
Пошаговое объяснение:
1) 3X – 5 = X
2X = 5
X = 2.5
2) 5.1 – 2.7X = 3.5X – 13.5
5.1 + 13.5 = 3.5X + 2.7X
18.6 = 6.2X
X = 3
3) 3.5X – 5.5 = 1.5X + 1.5
3.5X – 1.5X = 5.5 + 1.5
2X = 7
X = 3.5
1) 2.5
2) 3
3) 3.5
Пошаговое объяснение:
1) 3X – 5 = X
2X = 5
X = 2.5
2) 5.1 – 2.7X = 3.5X – 13.5
5.1 + 13.5 = 3.5X + 2.7X
18.6 = 6.2X
X = 3
3) 3.5X – 5.5 = 1.5X + 1.5
3.5X – 1.5X = 5.5 + 1.5
2X = 7
X = 3.5