Question

X + 2y =5
2x + y =16
what does x + y equal

Answer 1

x + y = 9 + - 2 =

x + y = 7

Explanation:

-2(x+2y=5) =

(-2x-4y= -10) + (2x+y=16) =

-3y = 6

y = 6/-3

y = -2

x + 2y = 5

x + 2(-2) = 5

x = 5 +4

x = 9

Answer 2

x = 9 ; y = -2

so,

x + y → 9 - 2 = 7

x + y = 7

Explanation:

x + 2y = 5 ---- eqⁿ(1)

2x + y = 16 ---- eqⁿ(2)

eqⁿ(1) × 2

2x + 4y = 10 ---- eqⁿ(3)

through Elimination method

eqⁿ(3) - eqⁿ(2)

y = -2

putting value of y in eqⁿ(1)

x + 2(-2) = 5

x - 4 = 5

x = 5 + 4

x = 9