Rozwiąż układy równań. (zdjęcie w załączniku). ;))
a)
3y+x=52
(y+x):8:2=128 /*16
x=52-3y
y+x=2048
x=2048-y
2048-y=52-3y /+y-52
-2y=1996
y=-998
x=2048+998
x=3046
b)
a+b+9+6+3+a+b=54
6a+9b=126
2a+2b+18=54 /-18
6a+9b=126 /:3
2a+2b=36 /:2
2a+3b=42
a+b=18
a=18-b
2(18-b)+3b=42
36-2b+3b=42 /-36
b=6
a=18-6
a=12
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a)
3y+x=52
(y+x):8:2=128 /*16
x=52-3y
y+x=2048
x=52-3y
x=2048-y
2048-y=52-3y /+y-52
x=2048-y
-2y=1996
x=2048-y
y=-998
x=2048+998
y=-998
x=3046
b)
a+b+9+6+3+a+b=54
6a+9b=126
2a+2b+18=54 /-18
6a+9b=126 /:3
2a+2b=36 /:2
2a+3b=42
a+b=18
2a+3b=42
a=18-b
2(18-b)+3b=42
a=18-b
36-2b+3b=42 /-36
a=18-b
b=6
a=18-6
b=6
a=12
b=6