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What number must be placed in the box in the equation below to produce an equation that has more than one solution:\(5u + 3(4u - 6) = -3u - 27 + 20u + \boxed{\phantom{2}}?\)

 Dec 25, 2020
edited by Guest  Dec 25, 2020
 #1
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Nvm it was 9

 Dec 25, 2020
 #2
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Let us simplify the guests answer, first expand the equation to get

5u+12u-18=-3u-27+20u+? = 17u-18=17u-27+?, subtract 17u so that -18=-27+?, add 27 to both sides so that

?=9, so \(9\)

 Dec 25, 2020

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