Question

Cat mai repede, multumesc​

Answer 1

a) 2(y+3x)-[7y-(3x+5y)]=

=2y+6x-(7y-3x-5y)

=2y+6x-(2y-3x)

=2y+6x-2y+3x

=9x

b) 3(y-2x)+[4x-3y+2(x-y)]=

=3y-6x+(4x-3y+2x-2y)

=3y-6x+(6x-5y)

=3y-6x+6x-5y

=-2y

c) 4x+5y-[5x+11y-3(2x+3y)]=

=4x-5y-(5x+11y-6x-9y)

=4x-5y-(-x+2y)

=4x-5y+x-2y

=5x-7y

d) 6x-7y-[4x+5y-(9x+10y)]=

=6x-7y-(4x-5y-9x-10y)

=6x-7y-(-5x-15y)

=6x-7y+5x+15y

=11x+8y