30(x+2)-6(x+5)=54
⇒30x+60-6x-30=54
⇒24x=54-60+30
⇒24x=24
⇒x=1
Chúc bạn học tốt nhé! ^^
$30(x+2)-6(x+5)=54$
⇒ $30x+60-6x-30=54$
⇒ $24x+30=54$
⇒ $24x=54-30$
⇒ $24x=24$
⇒ $x=1$
Vậy $x=1$
giúp mình bài này với, huhu EX:[combine the sentences using a subordinator to make a complex sentence. number 1 is an example for you.] --1i'm going to the bank. i need some money.-- --i'm going to the bank because i need some money.-- 2.It's raining.She's going for a walk in the park. 3.She finishes her homework soon, she will fail the class. 4.We went to school.She decided to investigate the situation. 5.Jennifer decided to leave Tom. He was too worried about his job. 6.Dennis bought a new jacket. He had received one as a gift last week.
Người ta dùng một ròng rọc cố định để kéo một vật có khối lượng 30 kg lên cao 20 m với lực kéo 320 N a/ Tính công của lực kéo b/ Tính công hao phí để thắng lực cản c/ Tính hiệu suất của quá trình kéo
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Nghiệm của phương trình 4(3x−2)−3(x−4)=7x+20 là x=a . Chọn khẳng định đúng.
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