Sure! Let’s solve each equation step by step using the
Distributive Property, which states:
>
a(b + c) = ab + ac
> (or for subtraction:
a(b - c) = ab - ac)
We’ll distribute the number outside the parentheses to each term inside, then solve for
x.
---
[1] 7(3x / 1) = -1
Note: 3x / 1 is just 3x.
→ 7 * 3x = -1
→ 21x = -1
→ x =
-1/21
✔ Answer: x = -1/21
---
[2] -9(-3 - 8x) = -3
Distribute -9:
→ (-9)(-3) + (-9)(-8x) = -3
→ 27 + 72x = -3
Subtract 27 from both sides:
→ 72x = -3 - 27 = -30
→ x = -30 / 72 =
-5/12 (simplify by dividing numerator and denominator by 6)
✔ Answer: x = -5/12
---
[3] 1(7x - 1) = 6
Distribute 1 (which doesn’t change anything):
→ 7x - 1 = 6
Add 1 to both sides:
→ 7x = 7
→ x =
1
✔ Answer: x = 1
---
[4] -7(-7x + 9) = 5
Distribute -7:
→ (-7)(-7x) + (-7)(9) = 5
→ 49x - 63 = 5
Add 63 to both sides:
→ 49x = 68
→ x =
68/49
(Already simplified — 68 and 49 have no common factors)
✔ Answer: x = 68/49
---
[5] 9(6x + 3) = 5
Distribute 9:
→ 54x + 27 = 5
Subtract 27:
→ 54x = 5 - 27 = -22
→ x = -22/54 =
-11/27 (divide numerator and denominator by 2)
✔ Answer: x = -11/27
---
[6] -4(2x - 5) = 9
Distribute -4:
→ (-4)(2x) + (-4)(-5) = 9
→ -8x + 20 = 9
Subtract 20:
→ -8x = 9 - 20 = -11
→ x = (-11)/(-8) =
11/8
✔ Answer: x = 11/8
---
[7] -1(1x - 5) = 9
Distribute -1:
→ -1x + 5 = 9
→ -x + 5 = 9
Subtract 5:
→ -x = 4
→ x =
-4
✔ Answer: x = -4
---
[8] 6(-7x + 8) = 3
Distribute 6:
→ -42x + 48 = 3
Subtract 48:
→ -42x = 3 - 48 = -45
→ x = (-45)/(-42) =
15/14 (divide numerator and denominator by 3)
✔ Answer: x = 15/14
---
[9] 7(-1 - 8x) = 8
Distribute 7:
→ 7*(-1) + 7*(-8x) = 8
→ -7 - 56x = 8
Add 7 to both sides:
→ -56x = 15
→ x =
-15/56
✔ Answer: x = -15/56
---
[10] 6(-5x - 5) = -3
Distribute 6:
→ -30x - 30 = -3
Add 30:
→ -30x = 27
→ x = 27 / (-30) =
-9/10 (divide numerator and denominator by 3)
✔ Answer: x = -9/10
---
[11] -9(6x - 8) = -6
Distribute -9:
→ -54x + 72 = -6
Subtract 72:
→ -54x = -6 - 72 = -78
→ x = (-78)/(-54) =
13/9 (divide numerator and denominator by 6)
✔ Answer: x = 13/9
---
[12] 10(-9 / 10x) = 8
This one is tricky. It says:
10 times (-9 divided by 10x)
So:
→ 10 * (-9 / (10x)) = 8
Simplify: The 10 in numerator and denominator cancel:
→ -9 / x = 8
Now solve for x:
→ -9 = 8x
→ x =
-9/8
✔ Answer: x = -9/8
---
##
✔ Final Answers:
[1] x =
-1/21
[2] x =
-5/12
[3] x =
1
[4] x =
68/49
[5] x =
-11/27
[6] x =
11/8
[7] x =
-4
[8] x =
15/14
[9] x =
-15/56
[10] x =
-9/10
[11] x =
13/9
[12] x =
-9/8
Let me know if you’d like to see any step explained in more detail!
Parent Tip: Review the logic above to help your child master the concept of distributive property math worksheet.