Y=-4x-3
y=-2x+1
x=?
y=?

Step-by-step explanation:

(7 − 4x)/ 3 = y  ⇒ 4x + 3y = 7 ……..(i)  and 2x + 3y + 1 = 0  ⇒2x + 3y = -1 ……….(ii)  On subtracting (ii) from (i), we get:  2x = 8  ⇒x = 4  On substituting x = 4 in (i), we get:  16x + 3y = 7  ⇒3y = (7 – 16) = -9  ⇒y = -3  Hence, the solution is x = 4 and y = -3.Read more on Sarthaks.com - https://www.sarthaks.com/129994/solve-for-x-and-y-2x-3y-1-0-7-4x-3-y

x = -2

y = 5

Step-by-step explanation:

y = -4x - 3

y = -2x + 1             Multiply this whole equation by -1

-1(y = -2x + 1) = -y = 2x - 1

y = -4x - 3

-y = 2x - 1

0 = -2x - 4

4 = -2x

x = -2

y = -4x - 3      (Plug in x)

y = -4(-2) - 3

y = 8 - 3

y = 5

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

answer: 819.89 miles across america

step-by-step explanation: