Question

coloquem a conta armada pfvv​

Answer 1

A) 3×-2y=10

5×+2y=20

3 ×+ 5 -2y +2Y = 10 + 22

8×=32

x=32

x=32/8/x=4

3x-2y=10

3 (4)-2y=10

12-2y=10

-2y=10-12

-2y=-2

y=1

S=(41)

-a + 2B = 7

a-3b=-9

-a+a+a+2b-3b=7-9

-b=-2

B=2

A-3b=-9

A-3. (2)=-9

A-6=-9

A=-9+6

A=-3

S=(-3,2)

C)a+3b=5

2 a- 3B=-8

A+2a+3b-3b=5-8

3a=-3

A=-3/3

A=-1

A+3b=5

-1+3b=5

3b=5+1

3b=6

B=2

S=(-1,2)

D)

2a-b=-3

6 a+b=7

2a+6-b+b=-3+7

8a=4

A=4/8

A=1/2

2a-b=-3

2. (1/2)-b=-3

1-b=-3

-b=-3-1

-b=-4

B=4

S=(1/2,4)