if it is -X then X=5
if it was minus X the X=10
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2x+5=3x+1 -x=-4 x=4
2x = 3x + 1; -x = 1; x = -1.
3x+1+2x-2 = 64 3x+2x = 64-1+2 5x = 65 x = 13
Both equations are equal and so: 3x+1 = 2x+3 3x-2x = 3-1 x = 2 and by substituting y = 7
NM equals 2x + 1, as stated in the question!