Find the missing value to make the point (21) on the equation y = 3x + 9
x =
4
Plugging in x=4 into the equation y = 3x + 9:
y = 3(4) + 9
y = 12 + 9
y = 21
Therefore, the missing value is x = 4.
x =
Plugging in x=4 into the equation y = 3x + 9:
y = 3(4) + 9
y = 12 + 9
y = 21
Therefore, the missing value is x = 4.