Which of the following is an EQUATION? A: 20(p + 2) + 16(-3 - p)
B: -10 + 2
C: 6x + 4 - 2x = 20
D: 9m + 4 - 7m + 4m²

C

Step-by-step explanation:

An equation is where you already have the answer but you have to find out what the variable is to prove that the equation is true.

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

mia khalifa

step-by-step explanation: