Multiply the entire equation by the least common multiple of the denominators, which is 140, to clear the fractions: 40 - 35(x + 8) = 84(x - 3) - 210. Distribute the terms to get 40 - 35x - 280 = 84x - 252 - 210, which simplifies to -35x - 240 = 84x - 462. Rearranging brings 222 = 119x, so x = 222/119.