Question

5×-4y=15
6×-4y=18 Me ajudem ?????

Answer 1

$5x - 4y = 15 \: \: \: \: \: ( \times - 1) \\ 6x - 4y = 18 \\ \\ - 5x + 4y = - 15 \\ 6x - 4y = 18 \\ \\ 6x - 5x - 4y + 4y = 18 - 15 \\ x = 3 \\ \\ 5x - 4y = 15 \\ 5(3) - 4y = 15 \\ 15 - 4y = 15 \\ - 4y = 15 - 15 \\ - 4y = 0 \\ y = 0$


Resposta final: x = 3 , y = 0

Answer 2

5x-4x=15

5x=15+4y (÷5)
x= 3+4/5y
x=3


5*3-4y=15
15-4y=15
-4y=15-15
y=0÷4

y=0



Espero ter ajudado!!!!!❤️