4x-3+5x+9=7x-4+5x
问题描述:
4x-3+5x+9=7x-4+5x
答
即9-3+4=(7+5-5-4)x
3x=10
x=10/3
答
4x - 3 + 5x + 9 = 7x - 4 + 5x
9x + 6 = 12x - 4
12x - 9x = 6 + 4
3x = 10
x = 10/3