Question

alguém me ajuda!!!

b)-x+3y=24
-x-3y=52

c)-4x-6y=0
4x-y=-14

d)-3x+21y=6
3x+2y=17

e)3x-10y=-21
20x+10=90


f)-4a+14b=-44
4a+26=-4

g)-5p-q=-54
2p+q=24.

h)-3m+2n=6
7m-2n=-10​

Answer 1

Vamos lá.

b)-x+3y=24

-x-3y=52

-2x = 76

x = -38

38 + 3y = 24

3y = -14

y = -14/3

c)-4x-6y=0

4x-y=-14

-7y = -14

y = 2

-4x - 12 = 0

x = -3

d)-3x+21y=6

3x+2y=17

23y = 23

y = 1

3x + 2 = 17

3x = 15

x = 5

e)3x-10y=-21

20x+10y=90

23x = 69

x = 3

9 - 10y = -21

10y = 30

y = 3

f)-4a+14b=-44

4a+26b=-4

40b = -48

b = -6/5

a = 34/5

g)-5p-q=-54

2p+q=24

-3p = -30

p = 10

20 + q = 24

q = 4

h)-3m+2n=6

7m-2n=-10​

4m = -4

m = -1

3 + 2n = 6

n = 3/2