Construct an equation for the expression: 3 less than 2 times a number is 7. Show the solution to the equation and prove your solution to be true through your work.

2x - 3 = 7

Step-by-step explanation:

Equation:

2x - 3 = 7

Solution:

Add 3 to both sides

2x = 10

Divide bothsides by 2

x = 5

Proof

2x - 3 = 7

plug in x = 5

2(5) - 3 = 7

10 - 3 = 7

7 = 7

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step-by-step explanation:

constant of proportionality = 3 and the equation is c = 3p.

step-by-step explanation:

c = kp   where c = amount of caffeine in mg., p = oz of pepsi and k is the constant of proportionality.

substituting the values given:

24 = 8k

k = 3.

the same value of k will be obtained if we substitute the other given values.