Question

b)


x + y = 16

x – y = 74





c)


2 x - 3 y = - 16

5 x + 3y = 2

Answer 1

Resposta:

b)

x + y = 16

x – y = 74

2x=90

x=90/2

x=45

45+y=16

y=16-45

y=-29

(45,-29)

c)

2 x - 3 y = - 16

5 x + 3y = 2

7x=-14

x=-14/7

x=-2

-10+3y=2

3y=2+10

3y=12

y=12/3

y=4

(-2,4)