Question

Resolva os sistemas de acordo com a resolução do lado a)
x+y=7
x-y=1 (4,3)

B)2x-y=5
X+y=4 (3,1)

C)x-y=3
X+2y=9 (5,2)

D)2x+y=5
X-3y=6 (3,-1)

E)x+y=10
X-y=4 (7,3)

Answer 1

Resposta:

A) 4+3=7

4-3=1

B) 2×3-1=6-1=5

3+1=4

C) 5-2=3

5+2×2=5+4=9

D) 2×3+(-1)=6-1=5

3-3×(-1)=3+3=6

E) 7+3=10

7-3=4