Afirst number plus twice a second number is 1. twice the first number plus the second totals 14. find the numbers

Let's consider the first number to be and the second number to be . Based on the information in the problem, we can create the following equations:

Now, we can solve the equations through systems of equations. One way of doing this is by multiplying one of the equations so that there is a term in both equations which can be removed by addition or subtraction. In our case, we can multiply the entire first equation by 2 to get:

Now, subtract from both equations to get:

Now that we have found , "plug" it back into an equation to find :

Our answers are s = -4 and f = 9.

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40