Cảm hơn Thack you vinamiu Question Cảm hơn Thack you vinamiu in progress 0 Môn Toán Mít Mít 4 years 2020-10-24T06:48:19+00:00 2020-10-24T06:48:19+00:00 2 Answers 98 views 0
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Bài 74:
a) `541+(218-x)=735`
`⇒ 541+218-x=735`
`⇒ 759-x=735`
`⇒ x=759-735=24`
b) `5(x+35)=515`
`⇒ 5x+175=515`
`⇒ 5x=515-175=340`
`⇒ x=340/5=68`
c) `96-3(x+1)=42`
`⇒ 3(x+1)=96-42=54`
`⇒ x+1=54÷3`
`⇒ x+1=18`
`⇒ x=18-1=17`
d) `12x-33=3².3³`
`⇒ 12x-33=3^5`
`⇒ 12x-33=243`
`⇒ 12x=243+33=276`
`⇒ x=276/12=23`