Start with the bracket:

\((x + 54) - 28 = 69\).

Reverse the subtraction of 28 by adding 28 to both sides:

\(x + 54 = 69 + 28 = 97\).

Now reverse the addition of 54 by subtracting 54:

\(x = 97 - 54 = 43\).

Answer: 43

First reverse the multiplication by 2 by dividing both sides by 2:

\(x + 120 = 320 \div 2 = 160\).

Now reverse the addition of 120 by subtracting 120:

\(x = 160 - 120 = 40\).

Answer: 40

Reverse the addition of 75 by subtracting 75 from both sides:

\(\dfrac{25}{x} = 80 - 75 = 5\).

Now solve for \(x\).

\(\dfrac{25}{x} = 5\) means \(25 = 5x\).

Reverse the multiplication by 5 by dividing by 5:

\(x = 25 \div 5 = 5\).

Answer: 5

From \(\dfrac{y/2}{17} = 2\) multiply both sides by 17:

\(\dfrac{y}{2} = 2 \times 17 = 34\).

Now reverse the division by 2 by multiplying by 2:

\(y = 34 \times 2 = 68\).

Answer: 68

Reverse the subtraction of 15 by adding 15 to both sides:

\(35 + y = 56 + 15 = 71\).

Now reverse the addition of 35 by subtracting 35:

\(y = 71 - 35 = 36\).

Answer: 36