Question

what is the vaule of x in the equation 3x-4y=65, when y =4

Answer 1

Since you know y = 4, plug in 4 for "y" in the equation

3x - 4y = 65

3x - 4(4) = 65

3x - 16 = 65    Add 16 on both sides

3x = 81         Divide 3 on both sides

x = 27