jerichahowell3 jerichahowell3

04-09-2019
Mathematics

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The sum of three numbers is 61 the second number is 5 times the first while the third is 2 less than the first find the numbers

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Dlalex2316 Dlalex2316

04-09-2019

Answer:

9 + 45 + 7 = 61

Step-by-step explanation:

a+b+c = 61...eqn 1

b = 5a...eqn 2

c = a - 2...eqn 3

subst for b and c in eqn 1...

=> a+5a+a-2 = 61

=> 7a = 63

=> a = 9

subst for a in eqn 2...

=> b = 5×9 = 45

subst for a in eqn 3...

=> c = 9-2 = 7

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