Question

7/20 - (9/35 - 3/28)​

Answer 1

1) 9/35-3/38=3/20

2)7/20-3/20=4/20

Answer 2

To solve the expression, follow the order of operations (PEMDAS/BODMAS):

1. Parentheses/Brackets
2. Exponents/Orders
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)

Let's solve the expression step by step:

Step 1: Simplify the expression within the parentheses. 9/35 - 3/28

To subtract fractions, we need to find a common denominator, which is the least common multiple (LCM) of the denominators, which is 35 * 28 = 980.

(9/35) * (28/28) - (3/28) * (35/35) (252/980) - (105/980)

Step 2: Subtract the fractions: (252 - 105) / 980 147 / 980

Step 3: Simplify the fraction (if possible): The numerator (147) and denominator (980) share a common factor of 7.

(147 ÷ 7) / (980 ÷ 7) 21 / 140

Now, we have simplified the expression within the parentheses to 21/140.

Step 4: Now, we can perform the subtraction: 7/20 - 21/140

To subtract fractions, we again need to find a common denominator, which is the LCM of 20 and 140, which is 140.

(7/20) * (7/7) - (21/140) * (1/1) 49/140 - 21/140

Step 5: Subtract the fractions: (49 - 21) / 140 28 / 140

Step 6: Simplify the fraction (if possible): The numerator (28) and denominator (140) share a common factor of 28.

(28 ÷ 28) / (140 ÷ 28) 1 / 5

The final answer is 1/5.