Question

2x+y=10...(1) x+y=7....(2)​

Answer 1

Step-by-step explanation:

Solve by Substitution :

// Solve equation [2] for the variable x

[2] x = y - 7

// Plug this in for variable x in equation [1]

[1] 2•(y -7) - y = -10

[1] y = 4

// Solve equation [1] for the variable y

[1] y = 4

// By now we know this much :

x = y-7

y = 4

// Use the y value to solve for x

x = (4)-7 = -3

Solution :

{x,y} = {-3,4}

Answer 2

Answer:

-3 and 4

Step-by-step explanation:

Hope it's correct thank you ~♥~