Question

When 9 times a number is

increased by 30, the answer
is the same as when 140 is
decreased by the number.
Find the number

Answer 1

11

Explanation:

You have to make it into an linear equation.

We're going to put n instead of number.

9 lots of n = 9n.

9n + 30 = 140 - n.

-30 on both sides.

9n = 110 - n.

+n on both sides.

10n = 110.

Divide by 10 on both sides.

Therefore, n = 11.

Hope this helps :)