Question 1013088
Let A be the reaction at the left side of the bridge, B the reaction at the right.
Force equation:
{{{A+B=20000+60000}}}
{{{A+B=80000}}}
Moment equation (using the left reaction point as zero point):
{{{20000(5)+60000(10)=B(20)}}}
{{{B=1000(5)+3000(10)}}}
{{{B=5000+30000}}}
{{{B=35000}}}{{{N}}}
Then,
{{{A+35000=80000}}}
{{{A=45000}}}{{{N}}}