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y+y+y+x=52
strasznie dziwny układ... ale pewnie proste, spróbujmy :)
½(y + x)*8 = 128
3y + x = 52
(½y + ½x)*8 = 128
3y + x = 52
4y + 4x = 128
3y + x = 52
x = 52 - 3y
4y + 4*(52 - 3y) = 128
4y + 208 - 12y = 128
4y - 12y = 128 - 208
-8y = -80 |:(-8)
y = 10
x = 52 - 3y
x = 52 - 3*10
x = 52 - 30
x = 22