Question

y+7x=50, 14x-5y=-28 determine whether each system of linear equations has unique solutions, no solution or infinitely many solut​

Answer 1

Answer:

the variable y

[1] y = -7x + 50

// Plug this in for variable y in equation [2]

[2] -5•(-7x+50) + 14x = -28

[2] 49x = 222

// Solve equation [2] for the variable x

[2] 49x = 222

[2] x = 222/49

// By now we know this much :

y = -7x+50

x = 222/49

// Use the x value to solve for y

y = -7(222/49)+50 = 128/7