document.write( "Question 60730This question is from textbook
\n" ); document.write( ": I need to solve this equation in three variables 2x - y =2 3z = 21 4x + z =19 \n" ); document.write( "
Algebra.Com's Answer #41725 by uma(370)\"\" \"About 
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Given that\r
\n" ); document.write( "\n" ); document.write( "2x - y =2  (1)
\n" ); document.write( "3z = 21 (2)
\n" ); document.write( " 4x + z =19 (3)
\n" ); document.write( "First solve the second equation, since it has only one variable.
\n" ); document.write( "3z =21
\n" ); document.write( "Divide by 3
\n" ); document.write( "z = 21/3
\n" ); document.write( "z =7\r
\n" ); document.write( "\n" ); document.write( "Now put the value of z in equation (3), we get
\n" ); document.write( "4x + 7 = 19
\n" ); document.write( "4x = 19 -7
\n" ); document.write( "4x =12
\n" ); document.write( "x =12/4
\n" ); document.write( "x = 3\r
\n" ); document.write( "\n" ); document.write( "Now put the value of x in equation(1), we get\r
\n" ); document.write( "\n" ); document.write( "2(3)- y =2
\n" ); document.write( "6 – y = 2
\n" ); document.write( "6 – 2 = y
\n" ); document.write( "4 = y\r
\n" ); document.write( "\n" ); document.write( "Therefore the value of “x” =3, y =4 and z =7
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