document.write( "Question 58145This question is from textbook Mathematics Concepts and skills
\n" ); document.write( ": 3y-12=18 2x+11=19 -z+7=-3 Could you help me with these problems? Thank You!!!! \n" ); document.write( "
Algebra.Com's Answer #39913 by tutorcecilia(2152)\"\" \"About 
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3y-12=18
\n" ); document.write( "3y-12+12=18+12
\n" ); document.write( "3y=12+18
\n" ); document.write( "3y=30
\n" ); document.write( "3y/3=30/3
\n" ); document.write( "y=10
\n" ); document.write( "Check by plugging (y=10) back into the original equation.
\n" ); document.write( ".
\n" ); document.write( "2x+11=19
\n" ); document.write( "2x+11-11=19-11
\n" ); document.write( "2x=19-11
\n" ); document.write( "2x=8
\n" ); document.write( "2x/2=8/2
\n" ); document.write( "x=4
\n" ); document.write( "Check by plugging (x=4) back into the original equation.
\n" ); document.write( ".\r
\n" ); document.write( "\n" ); document.write( "-z+7=-3
\n" ); document.write( "-z+7-7=-3-7
\n" ); document.write( "-z=-10
\n" ); document.write( "-z/-1=-10/-1
\n" ); document.write( "z=10
\n" ); document.write( "Check by plugging (z=10) back into the original equation.\r
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