document.write( "Question 111177: Sir i need u help at the earliest .
\n" ); document.write( "1. Solve by elimination method:-
\n" ); document.write( "4x+5y=6
\n" ); document.write( "2/3x-5y=7\r
\n" ); document.write( "\n" ); document.write( "2.Solve by substitution method:-
\n" ); document.write( "5x+6y=7
\n" ); document.write( "7/8x+9/10y=3/4
\n" ); document.write( "thank u ........
\n" ); document.write( "

Algebra.Com's Answer #81101 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
I'll do one, you try the other one, and write back if you are still having trouble.
\n" ); document.write( ":
\n" ); document.write( "\"4x%2B5y=6\"
\n" ); document.write( "\"%282%2F3%29x-5y=7\"
\n" ); document.write( ":
\n" ); document.write( "Using the first equation, solve for y:
\n" ); document.write( ":
\n" ); document.write( "\"5y=6-4x\"
\n" ); document.write( "\"y=%286-4x%29%2F5\"
\n" ); document.write( ":
\n" ); document.write( "Now substitute this value for y into the second equation:
\n" ); document.write( ":
\n" ); document.write( "\"%282%2F3%29x-5%28%286-4x%29%2F5%29=7\"
\n" ); document.write( ":
\n" ); document.write( "\"%282x%29%2F3-6%2B4x=7\"
\n" ); document.write( "\"%282x%2B12x%29%2F3=7%2B6\"
\n" ); document.write( "\"14x=39\"
\n" ); document.write( "\"x=39%2F14\"
\n" ); document.write( ":
\n" ); document.write( "Now substitute this value of x into the first equation:
\n" ); document.write( ":
\n" ); document.write( "\"4%2839%2F14%29%2B5y=6\"
\n" ); document.write( "\"78%2F7%2B5y=6\"
\n" ); document.write( "\"5y=42%2F7-78%2F7\"
\n" ); document.write( "\"y=-36%2F35\"
\n" ); document.write( ":
\n" ); document.write( "Check:
\n" ); document.write( "\"%282%2F3%29%2839%2F14%29-5%28-36%2F35%29=13%2F7%2B36%2F7=49%2F7=7\"
\n" ); document.write( "\"4%2839%2F14%29%2B5%28-36%2F35%29=78%2F7-36%2F7=42%2F7=6\", Check
\n" ); document.write( ":
\n" ); document.write( "Ok, the next one is yours. Like I said, write back if you are still having trouble. Just remember to be very careful with your signs and with the arithmetic in general.
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