Question

(7-5 k)-(8-4k)+(5k+6)=8 помогите плиз

Answer 1

Вот......................

Answer 2

$(7-5 k)-(8-4k)+(5k+6)=8 \ 7-5k-8+4k+5k+6-8=0 \ 7-16+4k+6=0 \ 4k-3=0 \ 4k=3 \ k= frac{3}{4}$