Question

método de suma y resta 4x+3y=10
5x+7y=45por favorrrrrrrrrrrrrrrr​

Answer 1

Explicación paso a paso:

4x+3y=10. (7)

5x+7y=45 (-3)

28x+21y=70

-15x-21y=-135

+13x=-65

x=65/13

x=-5

sustitución

4x+3y=10

4(-5)+3y=10

-20+3y=10

3y=+10+20

3y=30

y=30/3

y=10