(5m 3 + 3mn 2) + (-7m 2 n + mn 2 - n 3) - (mn 2 + 2m 3)

4.5%

step-by-step explanation:

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x