Question

(3х+у)-(-х-4у)=
(х+6у)-(8х-7у)=
(m+n)-(m-n)=

Answer 1

(3х+у)-(-х-4у)=3х+у+х+4у=4х+5у
(х+6у)-(8х-7у)= х+6у-8х+7у=-7х+13у
(m+n)-(m-n)= m+n-m+n=2m+2n

Answer 2

3a-3b-2a-2b=a-b

Answer 3

а второй пажалусьа

Answer 4

пажалуста

Answer 5

2.4c-7.2d-2.6c+1.3d=-0.2c- 5.9d

Answer 6

Спасибо