Prosze o zrobienie to dziś jak najszybciej kliknijcie na to pliskazadanie 5/99 d,e,fd)e)f)i jeszcze .... Question from @Frokss

Frokss @Frokss

September 2018 1 15 Report

Prosze o zrobienie to dziś jak najszybciej kliknijcie na to pliska
zadanie 5/99 d,e,f

$\left \{ {{4a-2=b} \atop {3a+7b=1,5}} \right$

$\left \{ {{6x-3y=9} \atop {x+5y=-9,5}} \right$

i jeszcze 7/117 a i b

anskala

5/99

$\left \{ {{4a-2=b} \atop {3a+7b=1,5}} \right \left \{ {{4a-2=b} \atop {3a+7(4a-2)=1,5}} \right \left \{ {{4a-2=b} \atop {3a+28a-14=1,5}} \right \left \{ {{4a-2=b} \atop {31a=15,5}} \right \left \{ {{4a-2=b} \atop {a=0,5}} \right \left \{ {{4*0,5-2=b} \atop {a=0,5}} \right \left \{ {{b=0} \atop {a=0,5}} \right$

$\left \{ {{5x=4-2y} \atop {4x-y=3}} \right \left \{ {{5x=4-2y} \atop {4x-3=y}} \right \left \{ {{5x=4-2(4x-3)} \atop {4x-3=y}} \right \left \{ {{5x=4-8x+6} \atop {4x-3=y}} \right \left \{ {{5x+8x=10} \atop {4x-3=y}} \right \left \{ {{x=10/13} \atop {4x-3=y}} \right \left \{ {{x=10/13} \atop {40/13-3=y}} \right \left \{ {{x=10/13} \atop {y=1/13}} \right$

$\left \{ {{6x-3y=9} \atop {x+5y=-9,5}} \right \left \{ {{6x-3y=9} \atop {x=-5y-9,5}} \right \left \{ {{6(-5y-9,5)-3y=9} \atop {x=-5y-9,5}} \right \left \{ {{-30y-57-3y=9} \atop {x=-5y-9,5}} \right \left \{ {{-33y=66} \atop {x=-5y-9,5}} \right \left \{ {{y=-2} \atop {x=-5y-9,5}} \right$

$\left \{ {{y=-2} \atop {x=-5(-2)-9,5}} \right \left \{ {{y=-2} \atop {x=0,5}} \right$

7/117

$\left \{ {{x+2y=3} \atop {2x-y=1}} \right \left \{ {{x=3-2y} \atop {2(3-2y)-y=1}} \right \left \{ {{x=3-2y} \atop {6-4y-y=1}} \right \left \{ {{x=3-2y} \atop {-5y=5}} \right \left \{ {{x=3-2y} \atop {y=1}} \right \left \{ {{x=3-2} \atop {y=1}} \right \left \{ {{x=1} \atop {y=1}} \right$

$\left \{ {{x+4y=-2} \atop {3x-8y=10}} \right \left \{ {{x=-2-4y} \atop {3(-2-4y)-8y=10}} \right \left \{ {{x=-2-4y} \atop {-6-12y-8y=10}} \right \left \{ {{x=-2-4y} \atop {-20y=16}} \right \left \{ {{x=-2-4y} \atop {y=-0,8}} \right \left \{ {{x=-2+4(0,8)} \atop {y=-0,8}} \right \left \{ {{x=1,2} \atop {y=-0,8}} \right$