Question

how to solve simple equation 4p+7=-21 and also check the results ​

Answer 1

Answer:

4 p = -21-7

4 p = -28

p = -28/4

p= -7

Answer 2

Given data: The equation $4p+7=-21$

To Find: The solution for the equation $4p+7=-21$

Solution:

• The equality between two expressions is called a equation and the equation consists of constants and variables.
• Consider the given equation, $4p+7=-21$
• Transpose the value 7 to the right side,
• $4p=-21-7$, the transposition of 7 changes its sign from positive to negative.
• $4p=-28$
• $p=\frac{-28}{4}$
• $p=-7$
• To check the solution, substitute p=-7 in the equation.
• $4(-7)+7=-21$
• $-28+7=-21$
• $-21=-21$
• Thus, the equation satisfies the solution.
• Therefore, the solution for the equation $4p+7=-21$ is $p=-7$.