Question

упростите выражения (2p+1.9)-(7-p)
в) (3-0.4а)-(10-0.8а)

Answer 1

$2p + 1.9 - 7 + p = (2p + p) + 1.9 - 7 = 3p + ( - 5.1) = 3p - 5.1$
3-0.4a-10+0.8a=3-10-0.4a+0.8a=-7+0.4a