Rozwiąż metodą ukladow równan liniowych :
a) x+2y=1/2
5x+3y-3/4
b) 4x-y=1/5
1/5 + y=4
a.x=½-2y
5×(½-2y)+3y=¾
x=½-2y
5/2-10y+3y=¾
-7y=¾-5/2
-7y=¾-10/4
-7y=-7/4
y=¼
x=½-2×¼
x=0
b.4x-y=1/5
y=4-⅕=3⅘
4x-3⅘=⅕
4x=⅕+3⅘
4x=4
x=1
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a.x=½-2y
5×(½-2y)+3y=¾
x=½-2y
5/2-10y+3y=¾
x=½-2y
-7y=¾-5/2
x=½-2y
-7y=¾-10/4
x=½-2y
-7y=-7/4
x=½-2y
y=¼
x=½-2×¼
x=0
b.4x-y=1/5
y=4-⅕=3⅘
4x-3⅘=⅕
4x=⅕+3⅘
4x=4
x=1