Плс срочно помогите Решите систему уравнений способом сложения: А) 11x-17y=-6 3x...

July 2022 1 5 Report

Плс срочно помогите

Решите систему уравнений способом сложения:
А) 11x-17y=-6
3x+4y=7

В) 15х-6у=10,5
3х+4у=-0,5

Answers & Comments

Chemist0 $\left \{ {{11x - 17 y = -6} \atop {3x+4y=7}} \right. 

 +\left \{ {{11x-17y=-6|*4} \atop {3x+4y=7|*17}} \right. 

4(11x - 17y) + 17(3x + 4y) = 4*(-6) + 17 * 7

95x = 95

x = 1

11(1) - 17y = -6

y = 1

(1 ; 1)
$

$\left \{ {{15x-6y=10.5} \atop {3x+4y=-0.5}} \right. 

 +\left \{ {{15x-6y=10.5|*2} \atop {3x+4y=-0.5|*3}} \right. 

2(15x - 6y) + 3(3x + 4y) = 2 * 10.5 + 3 * (-0.5)

39x = 19.5

x = 0.5

15(0,5) - 6y = 10.5

y = -0.5

(0.5 ; -0.5)$

1 votes Thanks 1

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