а)-0,5(3x-4)+15x=4(1,5x+1)+3 б)(2x-3)(2x+3)-x^2=12x-69+3x^2

Question

а)-0,5(3x-4)+15x=4(1,5x+1)+3 б)(2x-3)(2x+3)-x^2=12x-69+3x^2

Answer 1

а)-0,5(3x-4)+15x=4(1,5x+1)+3

-1,5х+2+15х=6х+4+3

7,5х=5

х=2/3

б)(2x-3)(2x+3)-x^2=12x-69+3x^2

4х^2-9-х^2=12х-69+3х^2

4х^2-х^2-12х+3х^2=-69+9

-12х=-60

х=5