長(zhǎng)方形面積為x平方英尺,周長(zhǎng)x英尺,寬3英尺,求長(zhǎng)幾尺?
設(shè)長(zhǎng)為a,x=2*(a+3)=3a,解得a=6,長(zhǎng)6英尺為什么2×(a+3)=3a?周長(zhǎng)=面積我的意思是問(wèn)2×(a+3)是代表周長(zhǎng),周長(zhǎng)為什么等于3a,為什么等于三倍的長(zhǎng)題目已給寬3尺。面積=長(zhǎng)*寬。親 你是不是看累了犯糊涂了。題目說(shuō)周長(zhǎng)面積數(shù)值相等的
SAT數(shù)學(xué)題求翻譯及完整解題步驟
SAT數(shù)學(xué)題求翻譯及完整解題步驟
A rectangular tabletop consists of a piece of laminated wood bordered by a thin metal strip along its four edges. The surface area of the tabletop is x square feet, and the total length of the strip before it was attached was x feet. If the table is 3 feet wide, what is its approximate length,in feet?
A rectangular tabletop consists of a piece of laminated wood bordered by a thin metal strip along its four edges. The surface area of the tabletop is x square feet, and the total length of the strip before it was attached was x feet. If the table is 3 feet wide, what is its approximate length,in feet?
英語(yǔ)人氣:241 ℃時(shí)間:2020-05-24 09:13:10
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