Question 3 and 4 need help

#1

Solving by submitting method:

By first equation,

Now, we can find the original value of y from Eqⁿ (ii).

Now, we can find the original value of x , from Eqⁿ (I)

Therefore, the values of x and y are 5 and 1 respectively.

#2

Solving by Eliminating method:

Step 1: Multiply Eqⁿ (I) by 3 and Eqⁿ (ii) by 2 to make the coefficients of y equal. Then we get the equations.

Step 2: Subtract Eqⁿ (iii) from Eqⁿ (iv) , we get

Therefore, the pair of equations has no solution.

Hope this helps!!

i need a picture

step-by-step explanation:

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