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3 years ago

If 5 times a number increased by 30 is 15, what is the number?

Mathematics

2 answers:

bija089 [108]3 years ago

7 0

Let's keep the,

Value of unknown number as y.

Then find the y,

→ 5y + 30 = 15

→ 5y = 15 - 30

→ 5y = -15

→ y = -15/5

→ [y = -3]

Therefore, -3 is the number.

weqwewe [10]3 years ago

3 0

Answer:

let x=the number

5x+30=15

5x=15-30

5x=-15

5x/5=-15/5

x=-3

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3 years ago