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x/3-y/7=1/2x/3+y/7=1/3用加减法怎么解?
题目详情
x/3-y/7=1/2 x/3+y/7=1/3用加减法怎么解?
▼优质解答
答案和解析
x/3-y/7=1/2 x/3+y/7=1/3
相加
x/3+x/3=1/2+1/3
2x/3=5/6
x=5/4
相减
y/7+y/7=1/3-1/2
2y/7=-1/6
y=-7/12
x=5/4,y=-7/12
相加
x/3+x/3=1/2+1/3
2x/3=5/6
x=5/4
相减
y/7+y/7=1/3-1/2
2y/7=-1/6
y=-7/12
x=5/4,y=-7/12
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