Solve the exercise:
3:(4+5)⋅9−6= 3:(4+5)\cdot9-6= 3:(4+5)⋅9−6=
We solve the exercise in parentheses:
3:9⋅9−6= 3:9\cdot9-6= 3:9⋅9−6=
39⋅9−6= \frac{3}{9}\cdot9-6= 93⋅9−6=
We simplify and subtract:
3−6=−3 3-6=-3 3−6=−3
-3