Question

Use elimination using multiplication to solve
2x-3/4y=-7
X+1/2y=0

Answer 1

{x,y}={-2,4}d

Explanation:

Solve equation [2] for the variable y

[2] y = -2x

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

[1] 8x - 3•(-2x) = -28

[1] 14x = -28

// Solve equation [1] for the variable x

[1] 14x = - 28

[1] x = - 2

// By now we know this much :

x = -2

y = -2x

// Use the x value to solve for y

y = -2(-2) = 4