Question

решите уравнение 7(х-2)-5(6х+3)=-1-9х

Answer 1

$7(x-2)-5(6x+3)=-1-9x$

$7x-14-30x-15 =-1-9x$

$-14-15+1 =-9x-7x+30x$

$-28=14x$

$x = - frac{28}{14} = -2$