Practice

Topic : Inequations

2x +4 ⩽ 18, where x is a natural number

Step 1 : 2x +4 ⩽ 18 (Given question)

Step 2 : 2x + 4 - 4 ⩽ 18 - 4 (Subtracting 4 from both sides by do and undo method)

Step 3 : 2x ⩽ 14 (Divided by 2 on both sides) - ie 4 - 4=0, 18 - 4=14

Step 4 : 2x/2 ⩽ 14/2

Step 5 : x ⩽ 7 (ie.,2x/2=x, 14/2=7)

Step 6 : Since the solution belongs to naturals number that are less than 7, the value of the x as 1,2,3,4,5 and 6

Step 7 : Therefore, the solutions are 1,2,3,4,5 and 6

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