Question

- { 13-2-[4+5-6+(-2)-7] } = ?

5-15-{-15+2-[7+12-(11+8)+2]+7 }=?

-8+13- {-6+13+[4+2-(4+8)+9]+6}=?

12+15+ {4-7-[8+3-(1+7)+15] } =?

sumas algebraicas aiuda​

Answer 1

-(13-2-(4+5-6-2-7))
-(13-2-(9-6-2-7))
-(13-2-(3-2-7))
-(13-2-(1-7))
-(13-2-(-6))
-(13-2+6)
-(11+6)
-17

5-15-(-15+2-(7+12-19+2)+7)
5-15-(-15+2-(19-19+2)+7)
5-15-(-15+2-(0+2)+7)
5-15-(-15+2-2+7)
5-15-(-13-2+7)
5-15-(-15+7)
5-15-(-8)
5-15+8
-10+8
-2

-8+13-(-6+13+(4+2-12+9)+6)
-8+13-(-6+13+(6-12+9)+6)
-8+13-(-6+13+(-6+9)+6)
-8+13-(-6+13+3+6)
-8+13-(7+3+6)
-8+13-(10+6)
-8+13-16
5-16
-11

12+15+(4-7-(8+3-8+15))
12+15+(4-7-(11-8+15))
12+15+(4-7-(3+15))
12+15+(4-7-18)
12+15+(-3-18)
12+15-21
27-21
6