Răspuns :
4 ·(5x + 8y ) = 3· ( 5x + 12y)
20x + 32y = 15x + 36y
20x - 15x = 36y - 32y
5x = 4y
x / y = 4 /5
20x + 32y = 15x + 36y
20x - 15x = 36y - 32y
5x = 4y
x / y = 4 /5
5x=3-8y
3-8y+12y=4
4y=4-3
4y=1
y=1/4
5x=3-8x1/4
5x=3-2
5x=1
x=1/5
x/y=1/5supra1/4
x/y=1/5x4
x/y=4/5
3-8y+12y=4
4y=4-3
4y=1
y=1/4
5x=3-8x1/4
5x=3-2
5x=1
x=1/5
x/y=1/5supra1/4
x/y=1/5x4
x/y=4/5