Question

Use the linear combination method to solve this system of equations. What is the value of x?

Negative 2.4 x minus 3.6 y = 1.2. 2.4 x + 1.2 y = 1.2.

Answer 1

is x=1

Explanation:

Answer 2

x = 1

Explanation:

We want to solve the equations for x

-2.4x-3.6y = 1.2

2.4x + 1.2y = 1.2

Add the two equations

-2.4y = 2.4

y = 2.4/-2.4

y = -1

To get x, simply substitute the y-value into any of the equations;

2.4x + 1.2y = 1.2

2.4x + 1.2(-1) = 1.2

2.4x -1.2 = 1.2

2.4x = 1.2 + 1.2

2.4x = 2.4

x = 2.4/2.4

x = 1