Red and gray bricks were used to build a decorative wall. The number of red bricks number of gray bricks was 5/2 . There were 175 bricks used in all how many gray bricks were used?(1 point)
Let's say the number of gray bricks used is G.
Since the ratio of red bricks to gray bricks is 5/2, the number of red bricks used is (5/2) * G = 5G/2.
The total number of bricks used is the sum of red and gray bricks which is G + 5G/2 = 175.
Multiplying throughout by 2 to get rid of the fraction gives 2G + 5G = 350.
Combining like terms gives 7G = 350.
Dividing both sides by 7 gives G = 350/7 = <<350/7=50>>50.
Therefore, 50 gray bricks were used. Answer: \boxed{50}.