Question

Solve eqn and find value of x ,y ,z
7x-y-0.5z=20
x-7y+5z=30
5x+5y-12z=40​

Answer 1

Answer:

Simplifying

5x + 3y + 0.5z = 100

Solving

5x + 3y + 0.5z = 100

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-3y' to each side of the equation.

5x + 3y + -3y + 0.5z = 100 + -3y

Combine like terms: 3y + -3y = 0

5x + 0 + 0.5z = 100 + -3y

5x + 0.5z = 100 + -3y

Add '-0.5z' to each side of the equation.

5x + 0.5z + -0.5z = 100 + -3y + -0.5z

Combine like terms: 0.5z + -0.5z = 0.0

5x + 0.0 = 100 + -3y + -0.5z

5x = 100 + -3y + -0.5z

Divide each side by '5'.

x = 20 + -0.6y + -0.1z

Simplifying

x = 20 + -0.6y + -0.1z

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