A, b, c and d are positive integers, such that a+b+ab = 76, c+d+cd = 54. find (a+b+c+d)·a·b·c·d.

3x - 4y = 4

Step-by-step explanation:

The equation of a line in standard form is

Ax + By = C ( A is a positive integer and B, C are integers )

Express the equation in slope - intercept form

y = mx + c ( m is the slope and c the y- intercept ), thus

y = x - 1

multiply through by 4

4y = 3x - 4 ( add 4 to both sides )

4y + 4 = 3x ( subtract 4y from both sides )

4 = 3x - 4y, or

3x - 4y = 4 ← in standard form