Mathematics
Grade-7
Easy

Question

Solve for s.
9 = 2s + 1

  1. 4
  2. -4
  3. 3.5
  4. 5

hintHint:

Apply two step process
Subtraction and then division .

The correct answer is: 4


    Given 9 = 2s + 1
    Solving for s , Steps  are
    Step 1 : Subtract 1 from both sides to make 1 zero on variable side
    9 -1 = 2s + 1 -1
    8 = 2s
    Step 2 : Divide both side by 2 so 2s becomes s
    2s/2 = 8/2
    s = 4
    So , we get s = 4 as the answer .

    First step be either addition / subtraction 

    if +ve sign is there in rhs with the number then subtract this number to both sides .

    if -ve sign is there in rhs with number then  add this number  to both side 

    And second step be division or multiplication ,

     After the above process if rhs variable is in multiply  , divide the number to both sides .

    After the above process if rhs variable is in divide multiply the number to both sides .
     

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