Question

решите уравнение 1,2х+5=5,72

Answer 1

$1,2x+5=5,72 \\ 1,2x=5,72-5 \\ 1,2x=0,72 \\ x=0,72:1,2 \\ x=0,6 \\ \\ 1,2*0,6+5=5,72 \\ 0,72+5=5,72 \\ 5,72=5,72$