$\"\"$ \ \

The equation is $\"\"$

According to subtraction property of equality: If a = b then a – c = b – c.

$\"\"$ (Subtract 4p from each side)

$\"\"$ (Apply Commutative property: a + b =b + a)

$\"\"$ (Subtract: $\"\"$ )

$\"\"$ (Add 15 to each side)

$\"\"$ (Subtract: $\"\"$ )

$\"\"$

$\"\"$ \ \

Verify:

To check the solution, substitute $\"\"$ in original equation.

$\"\"$

$\"\"$ (Multiply:, $\"\"$ )

$\"\"$ (Add: $\"\"$ )

Compare the values, the equation is true. The solution is $\"\"$ \ \

. $\"\"$ \ \

The solution is $\"\"$ .