document.write( "Question 165667: justin earns scores of 75,83,77,and 81 on his first four exams in math class. the final exam is worth twice a regular exam(twice the weight). he wants to earn a B, so he needs at least an 80 average. solve the following equation to find the lowest score he can earn and still get his B!\r
\n" ); document.write( "\n" ); document.write( "(75+83+77+81+2x) /6 =80\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "I must show my work and i don't know how ???? please help me !!!!!
\n" ); document.write( "

Algebra.Com's Answer #122130 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
(75+83+77+81+2x) /6 >=80
\n" ); document.write( "Multiply both sides by 6 to get:
\n" ); document.write( "316 + 2x >= 480
\n" ); document.write( "2x >= 164
\n" ); document.write( "x >= 82
\n" ); document.write( "===================
\n" ); document.write( "Chers,
\n" ); document.write( "Stan H.
\n" ); document.write( "
\n" ); document.write( "
\n" );