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最近我们刚刚学习了二元一次方程组的知识,一天放学后,我们几个同学装作很虚心的样子跑到崔老师的办公室请教.雷、董:崔老师,刚刚学习的解二元一次方程组,主要的方法就是通过代入法或加减法消元求解吗?师:是啊,(疑惑的样子)你们不会解二元一次方程组?董:不是的,我们在想,用代入法或加减法消元解二元一次方程组,好象很简单唉,不像你所说的“数学使人深刻”(偷笑).师:呀,说这个,是吗?我想想,你们先看这样一道题:在解方程组ax-by=13,cx-y烅烄烆=4时,甲同学因看错了b的符号,从而求得解为x=3,y=2烅烄烆.乙同学因看漏了c,从而求得解为x=5,y=1烅烄烆.试求a、b、c的值.
Recently, we have just learned the knowledge of binary equations, one day after school, several of our classmates pretend to be very modest look went to Cui teacher’s office to ask.Lei, Dong: Cui, just learning the solution of a binary equation Group, the main method is to eliminate the problem by substitution or addition and subtraction solution? Teacher: Yes ah, (you are puzzled look) you will not solve binary equations? Dong: No, we are thinking, using substitution method Or addition and subtraction elimination solution binary linear equations, it seems very simple alas, unlike what you say “math makes people profound ” (giggle.) Teacher: Yeah, that this is? I think Think, you first look at such a problem: in the solution of the ax-by = 13 equations, cx-y 烅 烄 烆 = 4, A due to the wrong students b symbol, so as to find the solution x = 3, y = 2 烅 烄 烆. B students to see for c, so as to find solution for x = 5, y = 1 烅 烄 烆. Try to a, b, c value.