Question

d) {12х +6y = 100
{22х - Зу = 60​

Answer 1

Resposta:

d){12х +6y = 100

{22х - Зу = 60

12x+6y=100 ÷2

6x+3y=50

3y=50-6x

22x-3y=60

22x-(50-6y)=60

22x-50+6x=60

28x=60+50

28x=110

x=110/28

x=55/14

3y=50-6x

3y=50-6×(55/14)

3y=50-330/14

3y=700-4620/14

3y= -3920/14

3y= -280

y=-280/3

y= -93,33