Rozwiąż równanie:
x + y = 36
0,5 · x + 1,5 · y = 42
z góry dzięki :)
x+y=36
0,5x +1,5y =42 / *(-1)
-0,5x - 1,5 y = -42 / *2
x=y=36
-x -3y = -84
-3y = -48 / :(-3)
y= 16
podstawiam :
x+16=36
x=36-16
x=20
y=16
x=-y+36
0,5(-y+36)+1.5y=42
-0.5y+18+1.5y=42
y=42-18
y=24
x=-24+36
x=12
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x+y=36
0,5x +1,5y =42 / *(-1)
x+y=36
-0,5x - 1,5 y = -42 / *2
x=y=36
-x -3y = -84
-3y = -48 / :(-3)
y= 16
podstawiam :
x+16=36
x=36-16
x=20
y=16
x=-y+36
0,5(-y+36)+1.5y=42
x=-y+36
-0.5y+18+1.5y=42
x=-y+36
y=42-18
x=-y+36
y=24
x=-y+36
x=-24+36
x=12
x=12
y=24