Question 1047256


{{{b + (b+45) + 90 + (2b-90) +( 3/2)b = 540}}}...first eliminate parentheses

{{{b + b+45 + 90 + 2b-90 +( 3/2)b = 540}}}

{{{b + b+45 + cross(90) + 2b-cross(90) +( 3/2)b = 540}}}

{{{4b +45  +( 3/2)b = 540}}}

{{{4b+( 3/2)b = 540-45}}}.........write {{{4b}}} as {{{(8/2)b}}}

{{{(8/2)b+( 3/2)b =495}}}

{{{( 11/2)b =495}}}..........both sides multiply by {{{2}}}

{{{2( 11/2)b =495*2}}}

{{{11b =495*2}}}

{{{11b =990}}}

{{{b =990/11}}}

{{{b =90}}}