Question

решите уравнения : x+x/2=9/2 x+x/5=-24/5 x/7+x/5=18/7 5(x-3)=4x 4(x+6)=x 7(-3+2x)=-6x-1 4(2-3x)=-7x+10

Answer 1

1. 2x+x=9 3x=9 x=3 2. 5x+x=-24 6x=-24 x=-4 3. 5x+7x=90 12x=90 x=1.2 4. 5x-15=4x x=15 5. 4x+24=x 3x=24 x=8 6. -21+14x=-6x-1 20x=20 x=1 7. 8-12x=-7x+10 5x=2 x=0,4