Question

12m + 3 (m - 1) = -2 (m + 1) + 12

Answer 1

Resolvendo:

$\mathsf{12m+3\left(m-1\right)=2\left(m+1\right)+12}\\\\\mathsf{12m+3m-3=2m+2+12}\\\\\mathsf{15m-3=2m+14}\\\\\mathsf{15m-2m=14+3}\\\\\mathsf{13m=17}\\\\\boxed{\mathsf{m=\dfrac{17}{13}}}\: \: \checkmark$