Question

18. Solve for x and y
x + y = 8; x - y = 2​

Answer 1

Step-by-step explanation:

x + y = 8. [ here x canclled out,]

x - y = 2.

- + - [we solve this

by elimination

2y = 6. method. ]

y= 3

putting the of y in [x+y=8]

x + y = 8

x + 3 = 8

x = 5

Answer 2

Answer:

$x + y = 8 \\ x - y = 2 \\ \\ \\ \\ 2x = 10 \\ x = 5 \\ substituting \: in \: any \: one \: of \: the \: equation \\ 5 + y = 8 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: y = 8 - 5 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: y = 3 \: \: \: \: \: \: \: \: \\ or \\ \ \: \: \: \: \: \: \: 5 - y = 2 \\ \: \: \: \: \: \: \: \: 5 - 2 = y \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 3 = y$