(4.8x+15.5)+(2.1x-12.2)
you can drop the parentheses because you cant use them. So we combine like terms first1.8x + 2.1x = 3.9x3.9x + 15.5 -12.23.9x + 3.3hope i helped :)
(4.8x+15.5)+(2.1x-12.2) (4.8x+2.1x)+(15.5-12.2) 6.9+3.300 hope I helped