Question

Quanto é : 4XY -3Y - (5Y +5Y)

Answer 1

$4xy-3y-(5y+5y)\\ 4xy-3y-5y-5y\\ 4xy-13y$

Answer 2

4xy-3y-5y-5y=0
4xy-10y-3y=0
4xy-7y=0
y.(4x-7)=0
y=0.

ou.

4x-7=0
4x=7
x=7/4
x=1,75