Reduce the 3x3 system to a 2x2 system.

-3x + y - 2z = 10
5x - 2y - 2z = 12
x - y + z = 23

what is the question?

step-by-step explanation:

the answer is 13 cm

2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6