1. Multiply all terms by 3 to clear the fractions.
x -12 = 2x +18
Subtract x from both sides.
-12 = x + 18
Subtract 18 from both sides.
-30 = x
2. 1/5x - 2 = 2/5x + 3
Multiply each term by 5 to clear the fractions.
x - 10 = 2x + 15
Subtract x from both sides. -10 = x + 15
Subtract 15 from both sides.
-25 = x
3. 1/4x + 9 = 2/3 x + 3
Multiply each term by 12 to clear the fractions.
3x + 108 = 8x + 36
Subtract 3x from both sides.
108 = 5x + 36
Subtract 36 from both sides.
72 = 5x
Divide both sides by 5
x = 14.4