Step 1 : Simplify both sides
-5(6a+21)=-15
(-5)(6a)+(-5)(21)=-15
-30a-105=-15
Step 2 : Add 105 to both sides
-30a-105+105=-15+105
-30a=90
Step 3 : Divide both sides by -30
-30a=90
—————
-30 -30
a = -3
Answer: D
Step-by-step explanation: I took the test
Answer:

Step-by-step explanation:

![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h2>~AnonymousHelper1807</h2>
If the problem is 6r•s•4rt•10rst, then the answer is 240•r^3•s^2•t^2.
Answer:
$13.75
Step-by-step explanation:
Bone-shaped treats are 5 for $3.50 at Shelley’s store and Sarah wants to buy 12. She set up and solved this proportion to find how much they would cost. Describe her error and find the correct solution. 5 3.5 = 12 x 3.5x = 60 x = $17.14
<u>5x2=10+3.75=13.75</u>