a, 457+(217-x)=589
b,96-3(x+1)=42
c,5.(x+35)=515
d,70-5(x-3)=45
e,10+2.x=4 mũ 5: 4 mũ 3
a, 457+(217-x)=589 b,96-3(x+1)=42 c,5.(x+35)=515 d,70-5(x-3)=45 e,10+2.x=4 mũ 5: 4 mũ 3
By Abigail
By Abigail
a, 457+(217-x)=589
b,96-3(x+1)=42
c,5.(x+35)=515
d,70-5(x-3)=45
e,10+2.x=4 mũ 5: 4 mũ 3
Đáp án:
bn tham khảo ko hiểu cứ nói nhé
Giải thích các bước giải:
a) `457 + (217 – x) = 589`
`=> 217 – x = 589 – 457`
`=> 217 – x = 132`
`=> x = 217 – 132`
`=> x = 85`
b) `96 – 3(x + 1) = 42`
`=> 3(x + 1) = 96 – 42`
`=> 3(x + 1) = 54`
`=> x + 1 = 18`
`=> x = 18 – 1 = 17`
c) `5(x + 35) = 515`
`=> x + 35 = 515 : 5`
`=> x + 35 = 103`
`=> x = 103 – 35 = 68`
d) `70 – 5(x – 3) = 45`
`=> 5(x – 3) = 70 – 45`
`=> 5(x – 3) = 25`
`=> x – 3 = 5`
`=> x = 5 + 3 = 8`
e) `10 + 2 . x = 4^5 : 4^3`
`=> 10 + 2 . x = 4^2`
`=> 2 . x = 4^2 – 10`
`=> 2 . x = 6`
`=> x = 3`
`\text{HỌC TỐT. NOCOPY}`
`a, 457 + ( 217 – x ) = 589`
`217 – x = 589 – 457`
`217 – x = 132`
`x = 217 – 132`
`x = 85`
`b, 96 – 3( x + 1 ) = 42`
`3( x + 1 ) = 96 – 42`
`3( x + 1 ) = 54`
`x + 1 = 54 : 3`
`x + 1 = 18`
`x = 18 – 1`
`x = 17`
`c, 5 . ( x + 35 ) = 515`
`x + 35 = 515 : 5`
`x + 35 = 103`
`x = 103 – 35`
`x = 68`
`d, 70 – 5(x-3) = 45`
`5(x-3) = 70 – 45`
`5(x-3) = 25`
`x – 3 = 25 : 5`
`x – 3 = 5`
`x = 5 + 3`
`x = 8`
`e, 10 + 2x = 4^5 : 4^3`
`10 + 2x = 16`
`2x = 16 – 10`
`2x = 6`
`x = 3`.