4x-3y=18 determine missing coordinate (?,-4)

x = 1.5 (or as the fraction 3/2)

Step-by-step explanation:

For this question, it is asking you to substitute numbers as variables using the coordinate pair given. (Important:) When looking at coordinates, the left number inside the parenthesis is the x-coordinate (? in this case), and the number in the parenthesis on the right is the y-coordinate (-4 in this case).

With that being said, this equation is basically asking us to solve for x. Now that we know this we can solve. Substitute y for -4:

4x - 3(-4) = 18

4x - (-12) = 18

When a negative sign is in front of a negative number, it becomes a positive number.

4x + 12 = 18

Now we can solve this problem using the proper formula. Subtract 12 from both sides of the equation to cancel out the +12:

4x + 12 = 18

     - 12   -12

      4x  =  6

Now we need to single out the x in order to solve:

4x  =  6  

4        4

x = 1.5 (or simplified as the fraction 3/2)

Let me know if you need any more help with this topic, I hope that this helps.

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column