3x-1=11
(3x-1)+1=11+1
3x=12
(3x)x(1/3)=12 x (1/3)
x=4
x^2+4
16+4
=20
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The answer would be 3x if 'X2' is '2x', but if 'X2' is x2, then the total answer would be x2 + x.
x2 - 81y2 = (x + 9y) (x - 9y)The actual numerical value depends on the values of 'x' and 'y'.
x=5/2 or 2.5
this is what type of question? value of x? difference of 2 squares? factoring?
"x2 = 100" is an equation which, if solved for x, will give you two possible value: 10 and -10.