Answer:
![\boxed{ \bold{ \huge{ \boxed{ \sf{x = - 11}}}}}](https://img.qammunity.org/2021/formulas/mathematics/high-school/ov3jnsklqiqka7a81is09y3u2ixf2uzx6i.png)
Explanation:
![\bigstar{ \sf{ \: - 12 = x - 1}}](https://img.qammunity.org/2021/formulas/mathematics/high-school/zon755bt04hjtp3y5tce7dvo6vb16xuy0r.png)
: Swap the sides of the equation
![\hookrightarrow{ \sf{x - 1 = - 12}}](https://img.qammunity.org/2021/formulas/mathematics/high-school/277zlozh734g9iplm9hcm263x6nkk044ky.png)
: Move 1 to right hand side and change it's sign
![\hookrightarrow{ \sf{x = - 12 + 1}}](https://img.qammunity.org/2021/formulas/mathematics/high-school/k6cgznow3za3juap6xrhno7vtax7qi4vdo.png)
: Calculate
Remember : The negative and positive integers are always subtracted but posses the sign of the bigger integer.
![\hookrightarrow{ \sf{x = - 11}}](https://img.qammunity.org/2021/formulas/mathematics/high-school/l50pe7wsy865o9wrzrp05dajbaqfqczpf0.png)
The value of x = 11
Hope I helped!
Best regards! :D
~TheAnimeGirl