What is 25-(8-5+3)-(12-5-8) ?

The solution to 25-(8-5+3)-(12-5-8) is 20

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25-(8-5+3)-(12-5-8)

25 - (8 - 5 + 3) - (12 - 5 - 8)

20

Solution steps

25 - (8 - 5 + 3) - (12 - 5 - 8)

Follow the PEMDAS order of operations

Calculate within parentheses

(8 - 5 + 3) : 6

8 - 5 + 3

Add and subtract (left to right)

8 - 5 = 3

= 3 + 3

3 + 3 = 6

= 6

= 25 - 6 - (12 - 5 - 8)

Calculate within parentheses

(12 - 5 - 8) : - 1

12 - 5 - 8

Add and subtract (left to right)

12 - 5 = 7

= 7 - 8

7 - 8 = - 1

= - 1

= 25 - 6 - (- 1)

Add and subtract (left to right)

25 - 6 - (- 1) : 20

25 - 6 - (- 1)

25 - 6 = 19

= 19 - (- 1)

Apply rule

- (- a) = + a

- (- 1) = + 1

= 19 + 1

19 + 1 = 20

= 20

= 20

1 (3 + 6) - 45 \div (7 + 8)

3 (4)^{2} + 1

8 + 10 \cdot 3

- 9 (2)^{2}

2 + 4 - 5