решите уравнения -8х=3.2. 4-5х=0. 10х+7=3. 3-4х=х-12. (х+7)-(3х+5)=2

-8x=3.2 | :(-8)x=-0.44-5x=0-5x=-4 | :(-5)x=0.810x+7=310x=-4 | :10x=-0.43-4x=x-12-4x-x=-12-3-5x=-15 | :(-5)x=3(x+7)-(3x+5)=2x+7-3x-5=2-3x+x=2-7+5-2x=0 | :(-2)x=0