Question

afla valoarea lui y din (x+y)+(x-y)+(x+y)+(x+y)=32 dacay=2

Answer 1

(x+y)+(x-y)+(x+y)+(x+y)= x+y+x-y+x+y+x+y=4x+3y 
4x+3y=32 
4x+3*2=32
4x+6=32
4x=32-6
4x=28
x=28 impartit la 4 
x=7 

Answer 2

(x+y)+(x-y)+(x+y)+(x+y)=x+2+x-2+x+2+x+2=4x+4=32 ⇒ 4x=28, x=7.