(X+7)-25=13 198-(x+4)=120 140:(x-8)=7 4 (x+41)=400 11 (x-9)=77 5 (x-9)=350 2x-49=5.3mů2 200-(2x+6)=4mů3 18/11/2021 Bởi Aubrey (X+7)-25=13 198-(x+4)=120 140:(x-8)=7 4 (x+41)=400 11 (x-9)=77 5 (x-9)=350 2x-49=5.3mů2 200-(2x+6)=4mů3
Đáp án: 1. `(x+7)-25=13` `<=>x+7=38` `<=>x=31` 2.`198-(x+4)=120` `<=>x+4=78` `<=>x=74` 3.`140:(x-8)=7` `<=>x-8=20` `<=>x=28` 4.`4 (x+41)=400` `<=>x+41=100` `<=>x=59` 5.`11 (x-9)=77` `<=>x-9=7` `<=>x=16` 6.`5 (x-9)=350` `<=>x-9=70` `<=>x=79` 7.`2x-49=5.3^2` `<=>2x-49=5.9` `<=>2x-49=45` `<=>2x=94` `<=>x=47` 8.`200-(2x+6)=4^3` `<=>2x+6=200-4^3` `<=>2x+6=200-64` `<=>2x+6=136` `<=>2x=130` `<=>x=65` Bình luận
Đáp án:
1. `(x+7)-25=13`
`<=>x+7=38`
`<=>x=31`
2.`198-(x+4)=120`
`<=>x+4=78`
`<=>x=74`
3.`140:(x-8)=7`
`<=>x-8=20`
`<=>x=28`
4.`4 (x+41)=400`
`<=>x+41=100`
`<=>x=59`
5.`11 (x-9)=77`
`<=>x-9=7`
`<=>x=16`
6.`5 (x-9)=350`
`<=>x-9=70`
`<=>x=79`
7.`2x-49=5.3^2`
`<=>2x-49=5.9`
`<=>2x-49=45`
`<=>2x=94`
`<=>x=47`
8.`200-(2x+6)=4^3`
`<=>2x+6=200-4^3`
`<=>2x+6=200-64`
`<=>2x+6=136`
`<=>2x=130`
`<=>x=65`
Đáp án:
Giải thích các bước giải: