Solve for x:
21 (2 - x) + 12 x = 44
21 (2 - x) = 42 - 21 x:
12 x + 42 - 21 x = 44
12 x - 21 x = -9 x:
-9 x + 42 = 44
Subtract 42 from both sides:
(42 - 42) - 9 x = 44 - 42
42 - 42 = 0:
-9 x = 44 - 42
44 - 42 = 2:
-9 x = 2
Divide both sides of -9 x = 2 by -9:
(-9 x)/(-9) = 2/(-9)
(-9)/(-9) = 1:
x = 2/(-9)
Multiply numerator and denominator of 2/(-9) by -1:
Answer: x = (-2)/9
