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2 years ago

nine times a number y subtracted from 85 is seven times the sum of four and y . ( i need the equation for this )

Mathematics

1 answer:

Sveta_85 [38]2 years ago

3 0

Step-by-step explanation:

then let's transistors this into mathematical symbols :

9 times a number y

9×y or simply 9y

subtracted from 85

85 - ...

is seven times

= 7 × ...

the sum of four and y

(4 + y)

together this is then

85 - 9y = 7 × (4 + y)

and just FYI : let's solve this

85 - 9y = 7×4 + 7y = 28 + 7y

85 = 28 + 16y

57 = 16y

y = 57/16 = 3.5625

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