Question 674378
x= 30cent stamps
y= 20cent stamps
...
.3x+.2y = 3.60
y = x-2
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.3x + .2(x-2) = 3.60
.3x + .2x - .4 = 3.6
.5x = 3.6 + .4
.5x = 4
{{{highlight_green(x = 8)}}} 30cent stamps
...
y = 8+2 = {{{highlight_green(y=10)}}} 20cent stamps

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