document.write( "Question 1187204: The sum of 8 and a certain number is equal to the product of the number and 3.find the number \n" ); document.write( "
Algebra.Com's Answer #818147 by math_tutor2020(3817)\"\" \"About 
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\n" ); document.write( "x = unknown number
\n" ); document.write( "x+8 = sum of the number and 8
\n" ); document.write( "3x = product of the number and 3\r
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\n" ); document.write( "\n" ); document.write( "Those two mentioned expressions are equal to one another
\n" ); document.write( "x+8 = 3x
\n" ); document.write( "8 = 3x-x
\n" ); document.write( "8 = 2x
\n" ); document.write( "2x = 8
\n" ); document.write( "x = 8/2
\n" ); document.write( "x = 4 is the unknown number\r
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\n" ); document.write( "\n" ); document.write( "In the second step, I subtracted x from both sides. A bit afterward, I divided both sides by 2 so I can isolate x.\r
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\n" ); document.write( "\n" ); document.write( "Check:
\n" ); document.write( "x+8 = 4+8 = 12
\n" ); document.write( "3x = 3*4 = 12
\n" ); document.write( "Both sides get us the same value, so we've shown that x = 4 is the solution to x+8 = 3x\r
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\n" ); document.write( "\n" ); document.write( "Answer: 4
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