Question

Спростіть вираз (7m-8)+(2m-4)​

Answer 1

$\large \boldsymbol {} \sf (7m-8)+(2m-4)=\underline{7m}-8+\underline{2m}-4=\\\\\\ 7m+2m-8-4=(7+2)m-12=\boxed{\sf9m-12}$