Question

The product of 9 and the sum of three times a number and 8 is 180. What is the number? A) 4 B) 6 C) 12 Eliminate D) 18

Answer 1

A

Explanation:

Remark

Remember to read this over a little at a time.

• Start with 3 times a number which is 3x
• Then go to the sum of 3 times a number and 8 which 3x + 8
• Now read 9 * (3x + 8)
• The result is 180

9 *( 3*x + 8) = 180 Remove the brackets

27x + 72 = 180 Subtract 72 from both sides.

27x = 180 - 72 Combine

27x = 108 Divide by 27

x = 108/27

x = 4 Answer