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y=x+2.4
x+x+2.4= 4(x-x+2.4)
2x+2.4= 4×2.4
2x+2.4=9.6
2x= 7.2
x=3.6
y= 3.6+2.4=6
y- druga liczba
x+y=4(x-y)
x=y+2,4
x+y=4x-4y
x-y=2,4 /×3
-3x+5y=0
3x-3y=7,2
2y=7,2
x-y=2,4
y=3,6
x-3,6=2,4
y=3,6
x=6