8th grade math, ive been sitting ere for 2 hours and i need someone to explain it.
ok,
21(2x)+12x=44
7 Answers

first distribute the 21
42  21x + 12x = 44
combine the x's
42  9x = 44
then subtract 42 from both sides
9x = 2
divide both sides by 9
x = 2/9

First, you distribute the 21 to everything in the parenthesis. That would give you 4221x+12x=44.
Second, you combine like terms: 429x=44
Third, subract 42 from boith sides: 9x=2
Fourth, divide both sides by 9: x= 2/9
Source(s): Im an eighth grader in algebra 1 
ok. here are the steps and how they're done.
1. 42  21x + 12x = 44. (distributive property.)
2. 42  9x = 44 (21x + 12x)
3. 9x = 2 (subtract 42 from both sides)
4. x = 2/9 (divide both sides by 9)
if that's not right, well it's late, I'm tired, and I did that in my head.

step one: distribute the 21 over the (2x). so you have 42+21x+12x=44.
step two: combine liketerms; add the 21x and 12x together. now you have 42+33x=44.
step three: subtract the 42 from both sides, now you have 33x=2.
step four: divide both sides by 33 and you have x=2/33

multiply (2x) by 21 to get 4221x+12x=44
combine like terms of 21x and 12x to get 429x=44
get the variable alone on one side by first subtracting 42 on both sides to get 9x=2
then get the variable alone further by dividing 9 on both sides to get x=negative 2/9
i hope this helps

it's very easy......
21(2)+21(x)+12x=44
4221x+12x=44
4244=21x12x
2=9x
x=2/9

try paying attention in class