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Solve this proportion c-1/c+2=4/7

1 Answer

3 votes

Answer:

c = 5

Explanation:

Order of Operations: BPEMDAS

Step 1: Define


(c-1)/(c+2) =(4)/(7)

Step 2: Solve for c

  1. Cross multiply:
    7(c-1)=4(c+2)
  2. Distribute:
    7c-7=4c+8
  3. Subtract 4c on both sides:
    3c-7=8
  4. Add 7 to both sides:
    3c=15
  5. Divide both sides by 3:
    c=5

Step 3: Check

Plug in c to verify it's a solution.


(5-1)/(5+2) =(4)/(7)


(4)/(7) =(4)/(7)

User Emelie
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