document.write( "Question 1030287: solve by substitution y=3x+1 the second part is 2x+2y=18 answer with (___,___) \n" ); document.write( "

Algebra.Com's Answer #645176 by Cromlix(4381) $\"\"$ $\"About$

You can put this solution on YOUR website!
Hi there,
\n" ); document.write( " y=3x+1.........(1)
\n" ); document.write( "2x+2y=18........(2)
\n" ); document.write( "Substitute y = 3x + 1 from Eq(1)
\n" ); document.write( "into Eq(2)
\n" ); document.write( "2x + 2y = 18
\n" ); document.write( "2x + 2(3x + 1) = 18
\n" ); document.write( "2x + 6x + 2 = 18
\n" ); document.write( "Collect like terms:
\n" ); document.write( "2x + 6x = 18 - 2
\n" ); document.write( "8x = 16
\n" ); document.write( "x = 2
\n" ); document.write( "Substitute x = 2 into
\n" ); document.write( "Eq(1)
\n" ); document.write( "y = 3x + 1
\n" ); document.write( "y = 3(2) + 1
\n" ); document.write( "y = 6 + 1
\n" ); document.write( "y = 7
\n" ); document.write( "(2,7)
\n" ); document.write( "Hope this helps :-) \n" ); document.write( "

\n" );