Question

4y = 9x - 21
y = x-4

Answer 1

Point form:

(1,-3)

Equation form:

x = 1 ,y = -3

Please let me know if this is incorrect.

Hope I helped though.

Answer 2

x = 1

y = -3

Explanation:

if y = x - 4

then reorganise the first equation

4 (x - 4) = 9x -21

4x - 16 = 9x - 21

5 = 5x

x = 1