Answer :

i. |3x - 5| = 1


3x - 5 = 1 or 3x - 5 = -1


3x = 1 + 5 or 3x = -1 + 5


3x = 6 or 3x = 4




ii. |7 – 2x| = 5


7 – 2x = 5 or 7 – 2x = -5


2x = 7 - 5 or 2x = 7 + 5


2x = 2 or 2x = 12



x = 1 or x = 6


iii.



8 – x = 2 × 5 or 8 – x = 2 × -5


8 – x = 10 or 8 – x = -10


x = 8 – 10 or x = 8 + 10


x = -2 or x = 18


iv.




20 + x = 4 × 5 or 20 + x = 4 × -5


20 + x = 20 or 20 + x = -20


x = 20 – 20 or x = -20 – 20


x = 0 or x = -40


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