Algebraic Equation - Education - Nairaland
Nairaland Forum › Nairaland General › Education › Algebraic Equation (378 Views)
| Algebraic Equation by Malayyyyy(op): 9:46pm On Apr 04, 2019 |
a+b+c+d+e=169, a+b=98, b+c=90, c+d=50, d+e=33, what are a,b,c,d,e? |
| Re: Algebraic Equation by youngest85(m): 9:48pm On Apr 04, 2019 |
How much you go give me |
| Re: Algebraic Equation by Malayyyyy(op): 9:58pm On Apr 04, 2019 |
Help me out pls |
| Re: Algebraic Equation by GMbuharii: 10:17pm On Apr 04, 2019 |
A=46 B=52 C=38 D=12 E=21 Check:46+52=98 52+38=90 38+12=50 12+21=33 46+52+38+12+21=169 ![]() |
| Re: Algebraic Equation by dejt4u(m): 10:36pm On Apr 04, 2019 |
Malayyyyy:Let's express b, c, d and e in term of a.. 1st eqn; a+b+c+d+e=169, 2nd eqn; a+b = 98; therefore, b = 98 - a ...........** 3rd eqn; b+c = 90, therefore, c = 90 - b but, b = 98 - a, !(from 2nd eqn) then, c = 90 - (98 - a) c = a - 8 ............*** 4th eqn; c+d = 50, d = 50 - c, but c = a - 8, !(from 3rd eqn) therefore, d = 50 - (a - ,d = 58 - a ...........**** 5th eqn, d + e = 33, e = 33 - d but d = 58 - a, ! (from 4th eqn) therefore, e = 33 - (58 - a) e = a - 25 .............***** Now, slot in the values of a, b, c, d, e as in **, ***, ****, ***** in 1st eqn; a+b+c+d+e=169, a + (98 - a) + (a - + (58 - a) + (a - 25) = 169,a + 98 - a + a - 8 + 58 - a + a - 25 = 169, a + 123 = 169, a = 169 - 123, a = 46 then, b = 98 - a = 98 - 46, b = 52 c = a - 8 = 46 - 8, c = 38 d = 58 - a = 58 - 46, d = 12 e = a - 25 = 46 - 25, e = 21 so, a = 46, b = 52, c = 38, d = 12, e = 21 |
| Re: Algebraic Equation by Malayyyyy(op): 10:51pm On Apr 04, 2019 |
Thank you |
| Re: Algebraic Equation by Martinez39(m): 8:02am On Apr 05, 2019 |
An easy way. Given that a + b = 98, b + c = 90, c + d = 50 & d + e = 33 Using the associative property of real numbers a + (b + c) + (d + e) = 169 = a + (90) + (33) = a + 123 (a + b) + (c + d) + e = 169 = (98) + (50) + e = 148 + e (a + b) + c + (d + e) = 169 = (98) + c + (33) = c + 131 ∴ a = 46 , e = 21 & c = 38 a + b = 46 + b = 98 ∴ b = 52 c + d = 38 + d = 50 ∴ d = 12 ∴ a = 46 , b = 52 , c = 38 , d = 12 & e = 21 Cc. Malayyyyy ![]() |
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