PILNE! :D
a) 5x+2y=3 -
4y+6=10x
b) x+y=5
2x+2 (y-4)=4
c) 5x-2y=8
10y-4x=16
d) x+y = 5
2x+y=10
z góry WIELKIE dzięki ; *
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1)4x+y=5
3x-2y=12
y=5-4x
3x-2(5-4x)=12
3x-10+8x=12
11x=22
x=2
y=5-8=-3
2)x-3y=5
4x+5y=1
x=5+3y
4(5+3y)+5y=1
20+12y+5y=1
17y=-19
y=-19/17
x=5-57/17=5-3 6/17=1 11/17
3)3x+4y=6
x-2y=4
x=4+2y
12+6y+4y=6
10y=-6
y=-⅗
x=4-1⅕=2⅘
4)x=5-y
x+2y=15
5+y=15
y=10
x=-5