Answer:
(6,-4)
Explanation:
Points on a plane are written as coordinates (x,y)
From ( ,-4), -4 corresponds to y and x is not known.
6x + 7y = 4x + 4y
Given the value of y = -4, we solve for the value of x by substituting the value of y = -4 into the equation
Step one
We collect like terms by subtracting 7y and 4x from both sides
6x + 7y - 7y - 4x = 4x + 4y - 7y - 4x
6x - 4x = 4y - 7y
2x = -3y
But y = -4. Therefore,
2x = -3(-4)
2x = 12
Step two
Divide both sides by the coefficient of the unknown variable = 2
2x/2 = 12/2
x = 6
Therefore, the missing value in the solution to the equation is 6.
( 6, -4)