Question

Пожалуйста решите номер 153-2)и4)

Answer 1

2) 8.7 · 2 = 0.5 · (15 + 4x)
8.7 · 2 : 0.5 = 15 + 4x
8.7 · 4 = 15 + 4x
34.8 = 15 + 4x
4x = 19.8
x = 4.95

4) 5.4 · (4.7x - 4.2) = 0.9 · 3
5.4 · (4.7x - 4.2) = 2.7
2 · (4.7x - 4.2) = 1
9.4x - 8.4 = 1
9.4x = 9.4
x = 1