Question

(3.6x+2.5)-(1.8x+2.3)=1.6x

Answer 1

3,6х+2,5-1,8х-2,3=1,6х

3,6х-1,8х-1,6х=2,3-2,5

0,2х=-0,2

х=-1

Answer 2

3.5х+2.5-1.8х-2.3=1.6х

1.8х+0.2=1.6х

1.8х-1.6х= -0.2

0.2х= -0.2

х= -1(ВЕрнО)

корнь есть