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If 3x+4y=17 and 5x+2y=23, what is the value of x-y?______[img]2014m5x/ct_egreqm
If 3x+4y=17 and 5x+2y=23, what is the value of x-y?______[img]2014m5x/ct_egreqm
游客
2025-02-24
21
管理
问题
If 3x+4y=17 and 5x+2y=23, what is the value of x-y?______
选项
答案
3
解析
The correct answer is 3. In order to solve this system of equations, subtract the first equation from the second. The result is 2x-2y=6. Factor out 2 to get 2(x-y)= 6. Divide both sides by 2; x-y=3.
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