Question 393422
{{{0.3x + 9 <= 0.7x - 8}}}

{{{0.3x + 9<= 0.7x - 8}}}.......add {{{-9}}} to both sides

{{{0.3x + 9 - 9 <= 0.7x - 8 - 9}}}


{{{0.3x +cross( 9) - cross(9) <=  0.7x - 17}}}


{{{0.3x  <=  0.7x - 17}}}......add {{{-0.7x}}} to both sides

{{{0.3x - 0.7x  <=  cross(0.7x) - cross(0.7x) - 17}}}


{{{-0.4x  <=   - 17}}}.......both sides multiply by {{{-1}}}

{{{-0.4x*(-1)  <=   - 17*(-1)}}}


{{{0.4x <= 17}}}

{{{x <= 17/0.4}}}

{{{x <= 42.5}}}