一元一次方程：1.2(x-2)-3(4x-1)=9(1-x)4x-4-12x+3=9-9x-8x+9x=9-3+4x=102.11x+64-2x=100-9x11x-2x+9x=100-6418x=36x=23.15-(8-5x)=7x+(4-3x)15-8+5x=7x+4-3x5x-7x+3x=4-15+8x=-34.3(x-7)-2[9-4(2-x)]=223x-21-2(9-8...a=2,b=4求2(a-b-54)+3(a+b)=5a+b-108=5*2+4-108=-94a=b=1求a+b-2(a-b+1)=-a+3b-2=-1+3-2=0就这样的题目随意出。顺便送你个公式，自创：a=x,b=y求u(a+b-p)+v(a-b+q)=(u+v)x+(u-v)y+vq-au代入就可以自己创造n道。O(∩_∩)O~