When the equation is in the form "y = mx + c" the intercept is given by 'c' (and the gradient by 'm'):
3x + 3y = 9
⇒ x + y = 3
⇒ y = -x + 3
⇒ Intercept is 3
(And the gradient is -1)
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x = 2.15 and y = 3.75
4x+3y = 6 3y = -4x+6 y = -4/3x+2 in slope intercept form
(3x+2y)*(5x-3y) =3x*5x + 3x*(-3y) + 2y*5x + 2y*(-3y) [This is sometimes called the FOIL method - You multiply the First members of each bracket, then the Outers, Inners, Lasts] = 15x2 - 9xy + 10xy - 6y2 = 15x2 + xy - 6y2
3x 3y + 6z = 12
5x+3y