giúp với 11h mình nộp rồi

Đáp án `+` Giải thích các bước giải:

$\text{Bài 13:}$

`a)`

`(x+25)+154=216`

`=>x+25=216-154`

`=>x+25=62`

`=>x=62-25`

`=>x=37`

Vậy `x=37`

`b)`

`462+(x+76)=577`

`=>x+76=577-462`

`=>x+76=115`

`=>x=115-76`

`=>x=39`

Vậy `x=39`

`c)`

`315+(x-162)=400`

`=>x-162=400-315`

`=>x-162=85`

`=>x=85+162`

`=>x=247`

Vậy `x=247`

`d)`

`(221-x)+48=93`

`=>221-x=93-48`

`=>221-x=45`

`=>x=221-45`

`=>x=176`

Vậy `x=176`

$\text{Bài 14:}$

`a)`

`91-(187-x)=42`

`=>187-x=91-42`

`=>187-x=49`

`=>x=187-49`

`=>x=138`

Vậy `x=138`

`b)`

`(364-x)+135=474`

`=>364-x=474-135`

`=>364-x=339`

`=>x=364-339`

`=>x=25`

Vậy `x=25`

`c)`

`(x-64)-48=72`

`=>x-64=72+48`

`=>x-64=120`

`=>x=120+64`

`=>x=184`

Vậy `x=184`

`d)`

`258-(x+212)=26`

`=>x+212=258-26`

`=>x+212=232`

`=>x=232-212`

`=>x=20`

Vậy `x=20`

$#BountyHunter$