which situation is represented by the equation?

6n + 5 = 3n + 20
a) jenny and pat all together have 6n + 3n cookies, jenny has 5 cookies and pat has 20 cookies. how many cookies does jenny have?
b) jenny and pat all together have 5 + 20 cookies, jenny has 6n cookies and pat has 3n cookies. how many cookies does jenny have?
c) jenny and pat all together have 3n + 20 cookies, jenny has 6n cookies and pat has 5 cookies. how many cookies does jenny have?
d) jenny and pat all together have 3n + 20 cookies, jenny has 6n plus 5 cookies more than and pat. how many cookies does jenny have?

starting with:    

5 + x - 12 = 2x - 7   

5 + x - 12 - x = 2x - 7 - x (subtract x from both sides)   

5 - 12 = x - 7 (combine and cancel x's from both sides)   

5 - 12 + 7 = x - 7 + 7 (add 7 to both sides)   

0 = x (add numbers together on both sides)       

so in order for the equation to be true, x must be 0.   

trying x = -0.5   

5 + x - 12 = 2x - 7 (original equation)   

5 + -0.5 - 12 = 2(-0.5) - 7 (plug in value of x)   

5 + -0.5 - 12 = -1 - 7 (did multiplication)   

-7.5 = -8 (did addition on both sides)       

since -7.5 is obviously not equal to -8, the value of -0.5 for x is wrong.   

trying x = 0   

5 + x - 12 = 2x - 7 (original equation)   

5 + 0 - 12 = 2(0) - 7 (plug in value of x)   

5 + 0 - 12 = 0 - 7 (did multiplication)   

-7 = -7 (did addition on both sides)       

since -7 equals -7, that demonstrates that the value of 0 for x is correct.   

trying x = 1   

5 + x - 12 = 2x - 7 (original equation)   

5 + 1 - 12 = 2(1) - 7 (plug in value of x)   

5 + 1 - 12 = 2 - 7 (did multiplication)   

-6 = -5 (did addition on both sides)       

since -6 is obviously not equal to -5, the value of 1 for x is wrong.

0.038

step-by-step explanation:

you would 18 *0.25 = 4.5

this would be 35. 35 + 5 = 40. you take the known constant and subtract by the answer of the equation and you get y.