(2 целых 3 десятых+2х)+1целая 3 десятых=3 решите
2 3/10+2х+1 3/10=3 2х+(2 3/10+1 3/10)=3 2х+3 6/10=3 2х=3-3 6/10 2х=-6/10 х=-3/10
( 2.3 + 2X ) + 1.3 = 3 3.6 + 2X = 3 2X = ( - 0.6) X = ( - 0.3 )