Question

How do you solve this using additional method elimination
3x + y = 17
4x - y = 18

Answer 1

// Solve equation [1] for the variable y

[1] y = -3x + 17 // Plug this in for variable y in equation [2]
[2] 4x - (-3x+17) = 18 [2] 7x = 35 // Solve equation [2] for the variable x

[2] 7x = 35 [2] x = 5 // By now we know this much : x = 5 y = -3x+17// Use the x value to solve for y
y = -3(5)+17 = 2 Solution : {x,y} = {5,2}
Is the answer