Пожалуйста решите номер 153-2)и4)
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