1. -2(x-3y)+(2x-9y) 2. 2c-(3c+(2c-3))

Question

1. -2(x-3y)+(2x-9y) 2. 2c-(3c+(2c-3))

Answer 1

1)   -2(х-3у)+(2х-9у)=-2х+6у+2х-9у=-3у
2)   2с-(3с+(2с-3))= 2с-(5с-3)= -3с+3=3(3-с)

Comments

спасибо