Question

3x+3y=1
X-3y=7
va rog urgentttt rezolvare completaaa

Answer 1

3(x+y)=1
xx-3y=7

x+y=$\frac{1}{3}$
x=7+3y

inlocuim

7+3y+y=$\frac{1}{3}$
7+4y=$\frac{1}{3}$
4y= $- \frac{20}{3}$
y= $- \frac{5}{3}$

x=7+ 3*$\frac{5}{3}$
x= 12