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1.twice a number when decreased by 9 gives 43.2.thrice a number when increased by 5 gives 38.3.four added to twice a number yields 26/5.4 a number when added to its half gives 72 |
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Answer» Step-by-step explanation: 1. Let the number be x. Twice the number is EQUAL to 2x Decreased by 9 is equal to 2x-9. According to the QUESTION 2x-9 =43. 2x=9+43 2x=52 x=52÷2 x=26. Therefore the number is 26. 2.Let the number be x Thrice the number is equal to 3X Increased by 5 is equal to 3x+5 According to the question 3x +5=38 3x =38-5 3x =33 x=33÷3 x=11 Therefore the number is 11 3.Let the number be x Twice a number is equal to 2x Four added to the number is equal to 2x +4 According to the question 2x+4=26/5 2x =26/5 - 4 2x = 26-20/5 2x =6/5 2x ×5=6 10x=6 x=6/10 x=3/5 Therefore the number is 3/5. 4.Let the number be x Half the number is equal to x/2 According to the question x+x/2 =72 2x+x=72 3x = 72 x=72/3 x = 24 Therefore the number is 24
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