Question

Срочноооо
1,4+12+(-1,69m)=6+1,4-6,69m
m=?

Answer 1

$\tt 1,4+12+(-1,69m)=6+1,4-6,69m\\13,4-1,69m=7,4-6,69m\\-1,69m+6.69m=7.4-13.4\\5m=-6\\m=-6:5\\m=-1.2$