1) {4y-x=11 {6y-2x=13 2) {2x +3y=16 {3X-2Y=11

Question

1) {4y-x=11 {6y-2x=13 2) {2x +3y=16 {3X-2Y=11

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Ответ(ы) на вопрос:

Accepted Answer

1) {4y-x=11 {6y-2x=13 -x=11-4y 6y-2x=13 x=4y-11 6y-2(4y-11)=13 x=4y-11 6y-8y+22=13 x=4y-11 -2y=13-22 x=4×4.5-11 y=4.5 x=7 y=4.5 2) {2x +3y=16 {3X-2Y=11 2x=16-3y => x=(16-3y)2 3×(16-3y)/2-2y=11 => (48-9y)/2=11+2y => 48-9y=2×(11+2y) => -9y-4y=22-48 =>-13y= -26 => y=2 x=(16-3×2)/2=5