Question

three times a number increased by 21 and the product of 9 and a number decreased by 7 ​

Answer 1

Question:-

• Three times a number increased by 21.
• The product of 9 and a number decreased by 7.

Answer:-

According to the first statement ;

Let a number be'x'

So, x + 21

According to the second statement ;

9 × x + 7 = 9x - 7

Let's form a equation ;

x + 21 = 9x - 7

x - 9x = -7 - 21

-10x = -28

x = -28/-10

x = 2.8