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Автор - 4tosebalom

Решите плиз срочно нужно

Ответ

Автор - VanilRio

1.

5m-3n=5*(-2)-3*(-1.5)=-10+4.5=-5.5

2.a)-7x-2=-2x+4

     -7x+2x=4+2

     -5x=6

       x=1.2

    b)2x-5/2-x+7/3=1

     3(2x-5/2)-2(x+7/3)=1

6x-15-2x+14/6=1

4x-1/6=1

4x-1=6

x=1.75

4x=7

x

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