For this case we must simplify the following expression:
![(1-2n) -7n (12-2) =](https://img.qammunity.org/2020/formulas/mathematics/middle-school/uvj4iq7cxszjyszecihtk0jxavv0wpfg5h.png)
We solve the operation of the second parenthesis, taking into account that different signs are subtracted and the sign of the major is placed:
![(1-2n) -7n (10) =](https://img.qammunity.org/2020/formulas/mathematics/middle-school/rr5yw5lfe5dhreq97ux3pgns6l4ox6808z.png)
We multiply:
![(1-2n) -70n =](https://img.qammunity.org/2020/formulas/mathematics/middle-school/12ycdaa99ov5gxw9xnvd5205em3t0ddhru.png)
We eliminate the parentheses:
![1-2n-70n =](https://img.qammunity.org/2020/formulas/mathematics/middle-school/mwqzk910b3nkkrho4huudzdxdlw6zo20c6.png)
We add similar terms, taking into account that equal signs are added and the same sign is placed:
![1-72n](https://img.qammunity.org/2020/formulas/mathematics/middle-school/1y5kxjoivgcwlrj2z0fhdg1k6a9jq9jqob.png)
Answer:
The simplified expression is:
![1-72n](https://img.qammunity.org/2020/formulas/mathematics/middle-school/1y5kxjoivgcwlrj2z0fhdg1k6a9jq9jqob.png)