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2014-07-05T16:08:28+03:00
A)5z + 3x+4y= 59-27
5z+3x+4y=32

b)x-2y+13=52
x-2y=52-13
x-2y=39

3x-6y+1=  3(x-2y)+1= 3*39+1=  117+1= 118
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2014-07-05T21:14:25+03:00
5z+3x+4y=59-27


x-2y=52-13=39
=>3(x-2y)=3x-6y=39*3=117; 3x-6y+1=118
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