document.write( "Question 1130668: hi! what do x and y equal in this system of linear equation: 2x+3y=78 and 6x+5y=180 \n" ); document.write( "

Algebra.Com's Answer #747307 by MathTherapy(10555) $\"\"$ $\"About$

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\n" ); document.write( "hi! what do x and y equal in this system of linear equation: 2x+3y=78 and 6x+5y=180
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This is SO, SO, SIMPLE!
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document.write( "2x + 3y = 78 -------- eq (i)
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document.write( "6x + 5y = 180 ------- eq (ii)
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document.write( "- 6x - 9y = - 234 --- Multiplying eq (i) by - 3 ------ eq (iii)
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document.write( "- 4y = - 54 --------- Adding eqs (iii) & (ii)
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document.write( "Now, substitute  for y in eq (i) or (ii) and find the value of x.
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document.write( "An alternative is to ELIMINATE y in the 2 original equations and you'll be able to find x. \n" );
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