Question

Пж решите срочо15х – 5х + 20 = 180
60 – ( х + 7 ) = 34
5х + х – 2х + 40 = 240
450 – 3х = 150
40 • х • 25 = 100 000
50 : х + 48 = 50
18 • (15 – х ) = 216