imeldarivera113 imeldarivera113

25-02-2021
Mathematics

contestada

one number is 5 times another number.their sum is 90.find the numbers.

Respuesta :

25-02-2021

Step-by-step explanation:

let both unknowns be x and y

x = 5y. ......(1)

x + y = 90. ......(2)

sub eqn (1) into eqn (2)

5y + y = 90

6y = 90

y = 90/6

= 15

sub y = 15 to eqn (1)

x = 5y

x = 5 × 15

× = 75

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