tìm x : x+1026=56985
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\(\left(x-2015\right)=1026x3+2\)
\(x-2015=3078+2\)
\(x-2015=3080\)
\(x=3080+2015\)
\(x=5095\)
Chúc em học tốt^^
\(\left(x-2015\right)=1026\times3+2\)
\(\Rightarrow x-2015=3078+2\)
\(\Rightarrow x-2015=3080\)
\(\Rightarrow x=5095\)
`@` `\text {Ans}`
`\downarrow`
`A.`
`x-56 \times 24 = 286`
`x-1344 = 286`
`x=286 + 1344`
`x=1630`
`B.`
`65 \times 54 - x = 1026`
`3510 - x =1026`
`x=3510 - 1026`
`x=2484`
`C.`
`36 \times 84 \div x = 72`
`3024 \div x = 72`
`x=3024 \div 72`
`x=42`
`D.`
`x \div 47 = 326 - 277`
`x \div 47 = 49`
`x= 49 \times 47`
`x=2303`
A. \(x-56\times24=286\\ x-1344=286\\ x=286+1344\\ x=1630\)
B. \(65\times54-x=1026\\ 3510-x=1026\\ x=3510-1026\\ x=2484\)
C. \(36\times84\div x=72\\ 3024\div x=72\\ x-3024\div72\\ x=42\)
D. \(x\div47=326-277\\ x\div47=49\\ x=49\times47\\ x=2303\)
\(\Rightarrow\frac{x}{18}-\frac{x}{19}=1-\frac{997}{1026}\)
\(\Rightarrow\frac{x}{18}-\frac{x}{19}=\frac{29}{1026}\)
\(\Rightarrow\frac{x}{18.19}=\frac{29}{1026}\)\(\Rightarrow x=\frac{29}{3}\)
\(\frac{x}{18}-\frac{x}{19}+\frac{997}{1026}=1\\ \Leftrightarrow x\left(\frac{1}{18}-\frac{1}{19}\right)+\frac{997}{1026}=1\\ x\cdot\frac{1}{342}=1-\frac{997}{1026}\\ x\cdot\frac{1}{342}=\frac{29}{1026}\\ x=\frac{29}{1026}:\frac{1}{342}=\frac{29}{1026}\cdot\frac{342}{1}\\ x=\frac{29}{3}\)
a)211:{1026-[34+1]:41}
=211:{1026-82:41}
=211:211
=211-11=2
b) (35+13):44*(2022*2021-4082419)
=256:44*4043
=0*4043
=0
chú thích:
*=dấu nhân
a | b | c | a + b + c | a – b + c | a + b x c | (a + b) : c |
6 | 3 | 3 | 12 | 6 | 15 | 3 |
10 | 2 | 6 | 18 | 14 | 22 | 2 |
30 | 5 | 7 | 42 | 32 | 65 | 5 |
a | b | c | a + b + c | a – b + c | a + b x c | (a + b) : c |
6 | 3 | 3 | 12 | 6 | 15 | 3 |
10 | 2 | 6 | 18 | 14 | 22 | 2 |
30 | 5 | 7 | 42 | 32 | 65 | 5 |
x+1026=56985
x = 56985 - 1065
x = 55920
x+1026=56985
x=56985-1026
x=55959