Question

Solve the system
x+y=20
x-y=-6
show steps pls be quick

Answer 1

Solve equation [2] for the variable x

[2] x = y + 6

Plug this in for variable x in equation [1]

[1] (y +6) + y = 20

[1] 2y = 14

Solve equation [1] for the variable y

[1] 2y = 14

[1] y = 7

By now we know this much :

x = y+6

y = 7

Use the y value to solve for x

x = (7)+6 = 13