Type "y=-3x-12x+3" on https://www.cymath.com/answer.php?q=2%3C%3Dx%3C3 CyMath helps so much and can graph, factor, mutiply and more!
For first one
Y=6x+21 can’t be changed
X=y/6-7/2
for the second
X=-12+3y
Y=4+x/3
Answer: ten thousand and 3
Step-by-step explanation:
I personally use RapidTables. Try it. It's quite simple.