Question

Cuanto es 2x+1y=7 2x-1y=1

Answer 1

x=2

y=3

2x+1y=7.

2x-1y=7

2x=7-1y

7-1y/2=x

x=3.5-.5y

2(3.5-.5y)-1y=1

7-1y-1y=1

-2y=1-7

-2y=-6

y=-6÷-2

y=3

2x+1(3)=7

2x+3=6

2x=7-3

2x=4

x=4÷2

x=2