Question

решить систему уравнений1) 4х+3у=10;х-2у=-3
2)3х-у=4;2х+3у=10

Answer 1

1.$left { {{4x+3y=10} atop {x-2y=-3}} right. ; left { {{x=-3+2y} atop {4*(-3+2y)+3y=10}} right. ; left { {{x=-3+2y} atop {-12+8y+3y=10}} right. ; left { {{x=-3+2y} atop {11y=22}} right. ; left { {{y=2} atop {x=1}} right. .$


2.$left { {{3x-y=4} atop {2x+3y=10}} right. ; left { {{y=3x-4} atop {2x+3(3x-4)=10}} right. ; left { {{y=3x-4} atop {2x+9x-12=10}} right. ; left { {{y=3x-4} atop {11x=22}} right.  ; left { {{x=2} atop {y=2}} right. .$