To solve equations like this we need to do inverse operations.
First we need to build an equation: 9+3x=21
We pass the nine to the other side, subtracting the 9 to 21, that leaves us with 3x=12
After that we just divide 12 by 3, wich gives us x=4, or, as it says in the question: n=4
Now let's double check:
N=4, since 3*4=12 and 12+9=21
Hope it is helpful :)
Answer:
bro just use ur hand
Step-by-step explanation:
It would be the square root of 85 which is 9.2
Answer:
0
Step-by-step explanation:
-9 x 0 is 0 and dividing anything with 0 is 0
Answer:
3 congruent sides
Step-by-step explanation:
When a triangle has three congruent sides, we call the triangle an equilateral triangle. We mark the congruent sides by a slash mark. The angles in an equilateral triangle are always 60°. When a triangle has two congruent sides it is called an isosceles triangle.
