Question 1121177
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ronnie has P92.00 in ones, fives and tens coins. He has 4 more P1.00 coins than P10.00 coins. the number of P5.00 coins is 2 more than 3 times the number of P10.00 coins. how many P5.00 coins are there?
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x, P1 coins
y, P5 coins
z, P10 coins


{{{system(x+y+z=92,x-z=4,y=3z+2)}}}


Use equations #2 and #3 in terms of z.

{{{system(x+y+z=92,x=z+4,y=3z+2)}}}


Substitute for x and y in the equation #1.
{{{highlight_green((z+4)+(3z+2)+z=92)}}}------One equation in one unknown variable, z.  Solve...