Apparently that is wrong. The book shows that and says fix theverything work.
yeah, when distributing 5x - 3(x - 6) = 2 the 3 is actually negative when multiplying, as is the 6, because of the subtraction signs. therefore, -3 * x = -3x, and -3 * -6 = 18.
so in the equation the -3x would be subtraction by 3x and addition by 18.