document.write( "Question 146410: Two angles are complementary. The sum of the measure of the first angle and one-fourth the second angle is 63.75 degrees. Find the measure of the angles.
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Algebra.Com's Answer #106889 by jim_thompson5910(35256)\"\" \"About 
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let x=measure of angle 1 and y=measure of angle 2\r
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\n" ); document.write( "\n" ); document.write( "\"Two angles are complementary\" tells us that the first equation is \"x%2By=90\"\r
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\n" ); document.write( "\n" ); document.write( "\"The sum of the measure of the first angle and one-fourth the second angle is 63.75 degrees\" translates to this equation:\r
\n" ); document.write( "\n" ); document.write( "\"x%2B%281%2F4%29y=63.75\"\r
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\n" ); document.write( "\n" ); document.write( "\"4%28x%2B%281%2F4%29y%29=4%2863.75%29\" Multiply both sides by the LCD 4 to clear the fraction\r
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\n" ); document.write( "\n" ); document.write( "\"4x%2By=255\" Multiply\r
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\n" ); document.write( "\n" ); document.write( "So we have the system of equations:\r
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\n" ); document.write( "\n" ); document.write( "\"system%28x%2By=90%2C4x%2By=255%29\"\r
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\n" ); document.write( "\n" ); document.write( "Now let's use substitution to solve this system\r
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\n" ); document.write( "\n" ); document.write( "Now in order to solve this system by using substitution, we need to solve (or isolate) one variable. I'm going to solve for y.\r
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\n" ); document.write( "\n" ); document.write( "So let's isolate y in the first equation\r
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\n" ); document.write( "\n" ); document.write( "\"x%2By=90\" Start with the first equation\r
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\n" ); document.write( "\n" ); document.write( "\"y=90-x\" Subtract \"x\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"y=-x%2B90\" Rearrange the equation\r
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\n" ); document.write( "\n" ); document.write( "---------------------\r
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\n" ); document.write( "\n" ); document.write( "Since \"y=-x%2B90\", we can now replace each \"y\" in the second equation with \"-x%2B90\" to solve for \"x\"\r
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\n" ); document.write( "\n" ); document.write( "\"4x%2Bhighlight%28%28-x%2B90%29%29=255\" Plug in \"y=-x%2B90\" into the first equation. In other words, replace each \"y\" with \"-x%2B90\". Notice we've eliminated the \"y\" variables. So we now have a simple equation with one unknown.\r
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\n" ); document.write( "\n" ); document.write( "\"3x%2B90=255\" Combine like terms on the left side\r
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\n" ); document.write( "\n" ); document.write( "\"3x=255-90\"Subtract 90 from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"3x=165\" Combine like terms on the right side\r
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\n" ); document.write( "\n" ); document.write( "\"x=%28165%29%2F%283%29\" Divide both sides by 3 to isolate x\r
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\n" ); document.write( "\n" ); document.write( "\"x=55\" Divide\r
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\n" ); document.write( "\n" ); document.write( "-----------------First Answer------------------------------\r
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\n" ); document.write( "\n" ); document.write( "So the first part of our answer is: \"x=55\"\r
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\n" ); document.write( "\n" ); document.write( "Since we know that \"x=55\" we can plug it into the equation \"y=-x%2B90\" (remember we previously solved for \"y\" in the first equation).\r
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\n" ); document.write( "\n" ); document.write( "\"y=-x%2B90\" Start with the equation where \"y\" was previously isolated.\r
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\n" ); document.write( "\n" ); document.write( "\"y=-%2855%29%2B90\" Plug in \"x=55\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=-55%2B90\" Multiply\r
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\n" ); document.write( "\n" ); document.write( "\"y=35\" Combine like terms \r
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\n" ); document.write( "\n" ); document.write( "-----------------Second Answer------------------------------\r
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\n" ); document.write( "\n" ); document.write( "So the second part of our answer is: \"y=35\"\r
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\n" ); document.write( "\n" ); document.write( "-----------------Summary------------------------------\r
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\n" ); document.write( "\n" ); document.write( "So our answers are:\r
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\n" ); document.write( "\n" ); document.write( "\"x=55\" and \"y=35\"\r
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\n" ); document.write( "\n" ); document.write( "So the measure of smaller angle is 35 degrees and the measure of the other angle is 55 degrees
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