If 3x+4y=17 and 5x+2y=23, what is the value of x-y?______[img]2014m5x/ct_egreqm

游客2025-02-24 38

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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If 3x+4y=17 and 5x+2y=23, what is the value of x-y?______[img]2014m5x/ct_egreqm

[img]2014m5x/ct_egreqm_egreqtbz1_0015_20135[/img][br]In1970,ifthecosttop

[img]2014m5x/ct_egreqm_egreqtbz1_0015_20135[/img][br]In1990,thetotalrevenu

[img]2014m5x/ct_egreqm_egreqjs_0128_20135[/img]A、5B、12C、24D、33E、41CThecorr

[img]2014m5x/ct_egreqm_egreqjs_0124_20135[/img]A、0.017328B、0.17328C、1.7328D、1

[img]2014m5x/ct_egreqm_egreqjs_0113_20135[/img]Inthefigureabove,whatisth

[img]2014m5x/ct_egreqm_egreqtbz1_0083_20135[/img][br]In1995,approximatelyho

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