Question

4x-4y=2 3x+2y=7 todos os jeitos

Answer 1

4x-4y=2 (:2)
3x+2y =7

2x-2y=1
3x+2y=7

5x = 8
x =8/5

3x+2y=7
3.8/5+2y=7
24/5 + 2y = 7 fazendo o mmc(5,1)=5
1.24/5+5.2y/5 = 5.7/5
24+10y=35
10y = 35-24
10y = 11
y = 11/10

(8/5, 11/10)