2х=1.8(х+5) дла начала раскроем скобки2х = 1.8х + 92х-1.8х = -9-0,2х=-90.2х=9х=9:0.2х=452*45 = 1.8(45+5)2*45 = 1.8*50 90 = 90верно
2x = 1.8(x+5)
2x = 1.8x+9
0.2x = 9
x = 45
2х=1.8(х+5)
дла начала раскроем скобки
2х = 1.8х + 9
2х-1.8х = -9
-0,2х=-9
0.2х=9
х=9:0.2
х=45
2*45 = 1.8(45+5)
2*45 = 1.8*50
90 = 90
верно
2x = 1.8(x+5)
2x = 1.8x+9
0.2x = 9
x = 45