# How do you solve #21>=3(a-7)+9#?

##### 1 Answer

Feb 13, 2017

#### Explanation:

distribute brackets on the right side.

#21>=3a-21+9#

#rArr21>=3a-12# add 12 to both sides.

#21+12>=3acancel(-12)cancel(+12)#

#rArr33>=3a# To solve for a, divide both sides by 3

#33/3>=(cancel(3) a)/cancel(3)#

#rArr11>=a" or "a<=11" is the solution"#