Plz dam jeszcze +20 punktów za obliczenia. Wszystko w załączniku.
zad. 3.2
x = 140
y = 186 i 2/3
z = 163 i 1/3
---------------------------
x + 4/3x + (x+y)/2 = 210
7/3x + (x+y)2 = 210 / *6
2x + 3(x + y) = 1260
5x = 1260 - 3y / : 5
x = (1260 - 3y)/5
y = 4/3 * (1260 - 3y)/5
y = 4/3 * 3(420 - y)/5
y = (1680 - 4y)/5
5y = 1680 - 4y
9y = 1680 / : 9
x = (1260 - 3 * 186 i 2/3)/5
x = 700/5
x - 140
z policzysz z trzeciego równanka, wyjdzie 163 i 1/3 :)
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zad. 3.2
x = 140
y = 186 i 2/3
z = 163 i 1/3
---------------------------
x + 4/3x + (x+y)/2 = 210
7/3x + (x+y)2 = 210 / *6
2x + 3(x + y) = 1260
5x = 1260 - 3y / : 5
x = (1260 - 3y)/5
y = 4/3 * (1260 - 3y)/5
y = 4/3 * 3(420 - y)/5
y = (1680 - 4y)/5
5y = 1680 - 4y
9y = 1680 / : 9
y = 186 i 2/3
x = (1260 - 3 * 186 i 2/3)/5
x = 700/5
x - 140
z policzysz z trzeciego równanka, wyjdzie 163 i 1/3 :)