Can anyone explain to me how to solve systems of equations with three variables? especially for this problem

x-3z=7

2x+y-2z=11

-x-2y+2z=6

Find the quotient of the complex numbers. Express your answer in trigonometric form. z1 = 5 (cos25Deg + i sin25Deg) z2 = 2 (cos80Deg + isin80Deg)

What is the value of x? 3x/4x = 3x+7/5x-8

Michele earned a total of $693 in simple interest form two separate accounts. In an account earning 6% interest, Michelle invested $1,200 more than four times the amount she invested in an account earning 3%. How much did she invest in each account?

What is the surface area of a conical grain storage tank that has a height of 37 meters and a diameter of 16 meters? Round the answer to the nearest square meter. A. 2,831 square meters B. 2,664 square meters C. 1,152 square meters D.

How is dividing a whole number by a fraction difdernt from dividing a fraction by a fraction

What is 13.48 rounded to the nearest tenth

What does 21 over 8 equals

An orange is shot up into the air with a catapult. The function h given by h (t) = 15+60t-16t^2 models the orange's height, in feet, t seconds after it was launched select all the true statements about the situation.

Aaron, a car salesman at KIA, makes 4% commission on all sales he sells 5 cars for $15,000 each. What was the total commission on his sales.

What is y + 10 = - 3 (x + 10) in slope-intercept form?