this is the distributive property: 39+8a=3(6a+2)+a 39 + 8a = 18a + 6 + a combine like terms 39 + 8a = 19a + 6 39 - 6 = 19a - 8a 33 = 11a 3 = a 29+4k=3(k+7) 29 + 4k = 3k + 21 29 - 21 = 3k - 4k 7 = -k -7 = k -4(2-8m)=-36+4m -8 + 32m = -36 + 4m 32m - 4m = -36 + 8 28m = 28 m = 1 7x+32=2(6x+6) 7x + 32 = 12x + 12 32 - 12 = 12x - 7x 20 = 5x 4 = x