1) 4а-(3+(5а-4)) 2) 7а-(4а+(8а-1)) 3) 5+(3а(6-7а))

Question

1) 4а-(3+(5а-4)) 2) 7а-(4а+(8а-1)) 3) 5+(3а(6-7а))

Answer 1

4а-(3+(5а-4)) =4а-(3+5а-4)=4а-3+5а-4=а-1
7а-(4а+(8а-1))=7а-(4а+8а-1)=7а-4а+8а-1=5а-1
5+(3а(6-7а))=5+18а-21а²

Comments

4a-(3+(5a-4))
4a-(3+5a-4)
4a-(-1+5a)
4a+1-5a
-a+1
-a=1
a=-1

---

4a-(3+(5a-4))=0
4a-(3+5a-4)
4a-(-1+5a)
4a+1-5a
-a+1
-a=1
a--1

Answer 2

1) 4а-(3+5а-4))
4а-(-1+5а)
4а+1-5а
-а+1

2)7а-(4а+8а-1)
7а-(12а-1)
7а-12а+1
-5а+1

3)5+(18а-21а²)
5+18а-21а²
-21а²+18а+5