Answer:
tough question guy needed more points to answer
Step-by-step explanation:
<h2>MARK AS BRAINLIEST </h2>
This is a linear equation in x.
So you need to group like terms

Let us group the x terms on the Right Hand Side of the equation and the constant terms on the Left Hand Side.

We can now simplify

Now let us divide both sides by 3.

This implies that

or

Let us our answer



Good we are right
Answer:
u=2
Step-by-step explanation:
8u-21 = 2u-9
+21 +21
8u= 2u + 12
-2u -2u
6u= 12
divide by 6, u=2 !!
Answer: 3a-21
Step-by-step explanation:
Apply distributive property
a=3-3*7
Multiply 3*7=21
Answer: 3a--21