Respostas

2014-01-28T12:37:39-02:00

3(3x-1)=2(4x+5)
9x-3=8x+10
9x-8x=10+3
x= 13

2014-01-28T12:46:04-02:00
3(3x-1)=2(4x+5)
9x-3= 8x+10
9x-8x= 10+3
x= 13

Se quiser tirar a prova real:
3(3.13-1)= 2(4.13+5)
3. (39-1) = 2. (52+5)
3. 38 = 2. 57
114 = 114 
Se equivalem!