Rozwiąż układy równań:
b) {x+2/3 =y-5/-4
{ 3x+2y=6
c) {x-2/3 + y+1/2=2
{ x-3y=2
d) {2x-y=4
{x-3/4 =y-2/5
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x+2/3 =y-5/-4 /*12
3x+2y=6
12x+8=-3y+15
3x+2y=6 /*(-4)
12x+3y=7
+ -12x-8y=-24
-----------------------
-5y=17 //(-5)
y=-3,4
3x+2*(-3,4)=6
3x-6,8=6
3x=12,8 //3
x=128/30
x=4⁴/₁₅
x-2/3 + y+1/2=2
x-3y=2
x+y=2+2/3-1/2
x-3y=2
x+y=2+4/6-3/6
x-3y=2
2-3y+y=2¹/₆
x=2-3y
-2y=¹/₆ //(-2)
x=2-3y
y=¹/₁₂
x=2-³/₁₂
y=¹/₁₂
x=1⁹/₁₂
2x-y=4
x-3/4 =y-2/5
2x-y=4
x-y=-2/5+3/4
2x-y=4
x-y=-8/20+15/20
2x-y=4
x-y=0,35
2*(0,35+y)-y=4
x=0,35+y
0,7+2y-y=4
x=0,35y
y=3,3
x=0,35*3,3
y=3,3
x=1,115