Respuesta :
(5.7x-0.8)-(4.9x-1.4)
5.7x-0.8-4.9x+1.4
(you add 1.4 because the minus sign and the negative cancel each other out)
0.8x+0.6
5.7x-0.8-4.9x+1.4
(you add 1.4 because the minus sign and the negative cancel each other out)
0.8x+0.6