0.6(4x-12)-0.4(5x-7)
0.6 * (4x - 12) - 0.4 * (5x - 7) = 0.4x - 7.2 - 2x + 2.8 = -1.6x - 4.4 = - (1.6x + 4.4)
2,4x-7,2-2x+2,8=0 0,4x-4,4=0 0,4x=4,4 x=11