Question

2x+2y=8 x-y=8
D) 3x+4y=15 x-.y=1
Me ajudem pfvr

Answer 1

Vamos là.

2x + 2y = 8

x - y = 8

x + y = 4

2x = 12

x = 6

6 + y = 4

y = -2

S = (6, -2)

3x + 4y = 15

x - y = 1

4x - 4y = 4

7x = 19

x = 19/7

19/7 - y = 7/7

y = 12/7

S =(19/7, 12/7)