Question

Resolva o sistema abaixo:

3/2x + 2/3 y =13
2x/5+y/3=3

Answer 1

mmc=6
9x+4y=78........(1)

mmc=15
6x+5y=45.......(2)

18x+8y=156........(1)
18x+15y=135......(2)

(2)-(1)
15y-8y=135-156
7y=-21
y=-21/7
y=-3

Em.....(1)

9x+4(-3)=78
9x-12=78
9x=78+12
9x=90
x=90/9
x=10