Question

Quanto é 15/4 + 20/9= x + 9,6?

Answer 1

15/4 + 20/9 = x + 96/10
x = 15/4 + 20/9 - 96/10
x = 15/4 + 20/9 - 48/5
mmc (4,9,5) = 180
x = (80:4.15 + 180:9.20 - 180:5.48)/180
x = (45.15 + 20.20 - 36.48)/180
x = (225 + 400 - 1728)/180
x = (625 - 1728)/180
x = -1103/180