Hello there!
Question:-
![\sf \longmapsto \: m = -12g + x](https://img.qammunity.org/2021/formulas/mathematics/high-school/ojovzo2aq1oixxas3oqv5s5opbr1qac3nl.png)
We need to find the value of x.
Solution:-
![\sf \: m = -12g + x](https://img.qammunity.org/2021/formulas/mathematics/high-school/p2ckxpkfcdzs098tdu4hbsob25vigmd41v.png)
Firstly, Over turn the equation:-
![\sf \longmapsto - 12g + x = m](https://img.qammunity.org/2021/formulas/mathematics/high-school/3r8j3h0b12urb2tmtxpk8d8f7wa6gdvhb7.png)
Then Add 12 g to both sides:-
![\sf \longmapsto - 12g+x+12g=m+12g](https://img.qammunity.org/2021/formulas/mathematics/high-school/cjnx7051jd5hhqwr93qur157msatbeql0n.png)
This equation may be rewritten as :-
![\sf \longmapsto - 12g + 12 g + x = m + 12g](https://img.qammunity.org/2021/formulas/mathematics/high-school/77z3ngus9cj9li0nyoi29k6e714olrb7s0.png)
On Simplification:-
As (-) and (+) equals to (-),
![\sf \longmapsto \: 1g + x = m + 12g](https://img.qammunity.org/2021/formulas/mathematics/high-school/rmxf7j24tqqip1xhcn7kin5pnyq9clwwvu.png)
![\sf \longmapsto \: x = m + 12g](https://img.qammunity.org/2021/formulas/mathematics/high-school/dgvvr8ucn4uz2jhzm5bv2p6cliopbdsngg.png)
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Henceforth,the value of x is :-
![\boxed{\huge \tt \: x = 12g + m}](https://img.qammunity.org/2021/formulas/mathematics/high-school/cugewocffryq9afm5bn2ef6xzk7p81tns9.png)
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Please let me know if you have any questions.
~MisterBrian