document.write( "Question 637743: -2.2 - 3(4 + 2.1a) = -1.9 \n" ); document.write( "

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Given: -2.2-3(4+2.1a)=-1.9
\n" ); document.write( "Perform the multiplicative distribution yields
\n" ); document.write( "-2.2-12-6.3a=-1.9
\n" ); document.write( "Simplifying gives
\n" ); document.write( "-6.3a = 2.2+12-1.9
\n" ); document.write( "-6.3a = 12.3
\n" ); document.write( "Divide both sides by -6.3
\n" ); document.write( "(-6.3a)/(-6.3) = 12.3/(-6.3)
\n" ); document.write( "a = -12.3/6.3
\n" ); document.write( "a = -41/21
\n" ); document.write( "Check your answer
\n" ); document.write( "Is [-2.2-3(4+2.1*(-41/21))=-1.9]?
\n" ); document.write( "Is [-2.2-3(4-4.1))=-1.9]?
\n" ); document.write( "Is [-2.2-3*(-0.1)=-1.9]?
\n" ); document.write( "Is [-2.2+0.3=-1.9]?
\n" ); document.write( "Is [-1.9=-1.9]? Yes
\n" ); document.write( "Answer: a = -41/21 \n" ); document.write( "

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