x-1/7x+16-1/5(x-1/7x+16)+5=x+9咋么求?
问题描述:
x-1/7x+16-1/5(x-1/7x+16)+5=x+9
咋么求?
答
同乘35,35x-5x+560-(7x-x+112)+175=35x+315
移项,-5x-6x=315-560+112-175
化简,-11x=-308
解得,x=28