Question 184910
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1st Condiion:
{{{4Pencil+5Pens=2.00}}}
2nd Condition:
{{{3Pencils+4Pens=1.58}}}
In 1st Condition we get, {{{4Pencils=2.00-5Pens}}},
{{{cross(4)*Pencils/cross(4)=(2.00-5Pens)/4=(2.00/4)-(5/4)Pens}}} 
{{{Pencils=(1/2)-(5/4)Pens}}},EQN 1
Susbt. EQN 1 in Condition 2:
{{{3((1/2)-(5/4)Pens)+4Pens=1.58}}}
{{{(3/2)-(15/4)Pens+4Pens=1.58}}}
{{{(-15+16)Pens/4=1.58-(3/2)}}}
{{{(1/4)Pens=(3.16-3)/2=0.16/2}}}
Cross Multiply:
{{{2Pens=4*0.16=0.64}}}
{{{cross(2)*Pens/cross(2)=cross(0.64)0.32/cross(2)}}}
{{{highlight(Pens=0.32/each)}}}
In EQN 1:--->{{{Pencils=(1/2)-(5/4)(0.32)=(1/2)-0.40=0.50-0.40}}}
{{{highlight(Pencils=0.10/each)}}}
In doubt?, Go back Condition 1:
{{{4(0.10)+5(0.32)=2.00}}}
{{{0.40+1.6=2.00}}}
{{{2.00=2.00}}}
Go back Condition 2:
{{{3(0.10)+4(0.32)=1.58}}}
{{{0.30+1.28=1.58}}}
{{{1.58=1.58}}}
Thank you,
Jojo</pre>