Algebra practice question

Answer: 30

n + (3/5)n = (8/5)n = 48, so n = 48 × 5/8 = 30.

Common wrong answers

If you answered 18

18 is three fifths of 30, not the number.

If you answered 80

80 comes from (3/5)n = 48 alone, ignoring the number itself.

If you answered 76.8

76.8 comes from multiplying 48 by 8/5 instead of 5/8.

More Algebra questions

• Easy–Medium
  A line passes through the points (0, 3) and (2, 7). What is the slope of the line?
• Easy–Medium
  A gym charges a $25 one-time signup fee plus $15 per month. Which equation gives the total cost C, in dollars,…
• Easy–Medium
  If 5(x − 2) = 3x + 4, what is the value of x?
• Easy–Medium
  A taxi charges a $3.50 base fare plus $2.25 per mile. If a ride costs $19.25 total, how many miles was the rid…
• Easy–Medium
  The equation of a line is 3x + 2y = 12. What is the y-coordinate of the point where the line crosses the y-axi…
• Easy–Medium
  A line in the xy-plane passes through the points (1, 5) and (4, 11). What is the y-intercept of the line?