A number increased by 7 is 15. - x + 7 = 15, Twice a number is equal to 24. - 2x = 24, The sum of two consecutive numbers is 37. - x + (x+1) = 37, A father is 3 times as old as his son. If the son’s age is x, the father's age is?  - 3x, A pen costs ₹10. If 5 pens cost ₹50, what is the equation? - 10x = 50, A number decreased by 9 is equal to 20. - 𝑥 - 9 = 20, The perimeter of a square is 40. If side length is x, what is the equation? - 4x = 40, Five times a number is 45. - 5x = 45, A number when subtracted from 25 gives 12. - 25 - x = 12, The sum of thrice a number and 4 is 19. - 3x + 4 = 19, The cost of 2 notebooks and 3 pens is ₹90. If a notebook costs ₹x and a pen costs ₹y: - 2x + 3y = 90,

Simple linear equations

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