Question

Resolva as equações abaixo:
21x+1=11x+6
9x-23+13x-27
X+X/5=12
X+X/7=-3

Answer 1

21x+1=11x+6
21x-11x=6-1
10x=5
x=5/10
x=0,5

9x-23+13x-27=0
13x+9x=27+23
22x=50
x=50/22
x=2,27

x+x/5=12
5x+x=12
6x=12
x=12/6
x=2

x+x/7=-3
7x+x=-3
8x=-3
x=-3/8
x=-0,37