Question

помогите срочно пж пж​

Answer 1

4х(7+3х)=-26+2х(4+3х)-6(х-х^2)
28х+12х^2=-26+8х+6х^2-6х+6х^2
28х+12х^2-8х-6х^2+6х-6х^2=-26
28х-8х+6х=-26
26х=-26
х=-1