a) x = -8 x coordinate has been given, we need to find y coordinate of the ordered pair. By substituting x = -8 in the equation we can find y 8y + 7x = -56 8y + 7 * -8 = -56 8y -56 = -56 8y = 0 therefore y = 0 (-8,0) b) y = 7 we need to substitute y = 7 into the equation to find x 8*7 + 7x = -56 56 + 7x = -56 7x = -56 - 56 x = -112/7 x = -16 (-16,7)
