0.7 + 0.3 * x + 0.3 * 2 = 0.4 * x - 0.4 * 3 ; 0.7 + 0.3 * x + 0.6 = 0.4 * x - 1.2 ; 1.3 + 0.3 * x = 0.4 * x - 1.2

0.3 * x - 0.4 * x = - 1.2 - 1.3 ; - 0.1 * x = - 2.5 ; x = 25