Answer:
249/10 = x, or x = 24.9
Explanation:
25 1/2 × 5 –3 = 5 x should be written as 25 1/2 × 5 –3 = 5x
The goal here is to solve for x (you should state this specifically).
Start by multiplying 25 1/2 by 5, since we must multiply before addition or subtraction:
One way of doing this multiplication is to multiply 25 by 5 and then 1/2 by 5 and then summing up the results:
25×5 = 125, and 1/2 × 5 = 5/2, so the end result is:
125 + 5/2, or 125 + 2 1/2, or 127 1/2.
Next, subtract 3 from this result:
127 1/2 - 3 = 124 1/2
Then 124 1/2 = 5x. Solve for x. Converting 124 1/2 into an improper fraction:
249/2 = 5x. Dividing both sides by 5, we get:
249/10 = x, or x = 24.9