Let’s solve each of the 8 two-step equations step by step. The goal is to isolate the variable on one side of the equation.
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1) 5a + 2/3 = -1/6
Step 1: Subtract 2/3 from both sides:
5a = -1/6 - 2/3
To subtract, get a common denominator (LCM of 6 and 3 is 6):
-1/6 - 4/6 = -5/6
So,
5a = -5/6
Step 2: Divide both sides by 5:
a = (-5/6) ÷ 5 = (-5/6) × (1/5) = -1/6
✔ Answer: a = -1/6
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2) 4/7 = 8(c - 6/7)
Step 1: Divide both sides by 8:
(4/7) ÷ 8 = c - 6/7
→ (4/7) × (1/8) = 4/56 = 1/14
So,
1/14 = c - 6/7
Step 2: Add 6/7 to both sides:
c = 1/14 + 6/7
Convert 6/7 to 12/14:
c = 1/14 + 12/14 = 13/14
✔ Answer: c = 13/14
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3) (r - 1)/2 = 0
Multiply both sides by 2:
r - 1 = 0
Add 1 to both sides:
r = 1
✔ Answer: r = 1
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4) -10 - m = -5/9
Step 1: Add 10 to both sides:
-m = -5/9 + 10
Convert 10 to 90/9:
-m = -5/9 + 90/9 = 85/9
Step 2: Multiply both sides by -1:
m = -85/9
✔ Answer: m = -85/9
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5) 8/5 = (3/5)u + 6/5
Step 1: Subtract 6/5 from both sides:
8/5 - 6/5 = (3/5)u
→ 2/5 = (3/5)u
Step 2: Multiply both sides by 5 to eliminate denominators:
2 = 3u
Then divide by 3:
u = 2/3
✔ Answer: u = 2/3
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6) (h + 4)/3 = 2/9
Step 1: Multiply both sides by 3:
h + 4 = (2/9) × 3 = 6/9 = 2/3
Step 2: Subtract 4 from both sides:
h = 2/3 - 4
Convert 4 to 12/3:
h = 2/3 - 12/3 = -10/3
✔ Answer: h = -10/3
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7) (1/6)k - 1 = 5
Step 1: Add 1 to both sides:
(1/6)k = 6
Step 2: Multiply both sides by 6:
k = 6 × 6 = 36
✔ Answer: k = 36
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8) -1/8 = 7/4 + (3/2)z
Step 1: Subtract 7/4 from both sides:
-1/8 - 7/4 = (3/2)z
Convert 7/4 to 14/8:
-1/8 - 14/8 = -15/8
So,
-15/8 = (3/2)z
Step 2: Multiply both sides by 2/3 to isolate z:
z = (-15/8) × (2/3)
Simplify:
(-15 × 2) / (8 × 3) = (-30)/24 = -5/4 (after dividing numerator and denominator by 6)
✔ Answer: z = -5/4
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✔ Final Answers:
1)
a = -1/6
2)
c = 13/14
3)
r = 1
4)
m = -85/9
5)
u = 2/3
6)
h = -10/3
7)
k = 36
8)
z = -5/4
Let me know if you’d like to see any step explained further!
Parent Tip: Review the logic above to help your child master the concept of two step equations worksheet with answers.