Answer:
6. 7x + 3 = 3x; x = -3/4
7. x - 5 = 3x - 9; x = 2
Step-by-step explanation:
6. 7x + 3 = 3x
Subtract 3x from both sides.
7x + 3 - 3x = 3x - 3x
4x + 3 = 0
Subtract 3 from both sides.
4x + 3 - 3 = 0 - 3
4x = -3
Divide both sides by 4.
x = -3/4
7. x - 5 = 3x - 9
Subtract x from both sides.
x - 5 - x = 3x - 9 - x
-5 = 2x - 9
Add 9 to both sides.
-5 + 9 = 2x - 9 + 9
4 = 2x
Divide both sides by 2.
4/2 = (2/2) x
2 = x
