Question

把方程2/1x=_2/3y=1 写成用含有y的代数式表示x的形式,并求X的值

Answer 1

1.

(1/2)x=-(2/3)y=1

(1/2)x=-(2/3)y

x=-(4/3)y;

2.

(1/2)x=1,-(2/3)y=1

x=2,y=-3/2