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2X + 8^2 = 2X+64, for whatever value X. If the question is (2x+8)², the answer is 4x²+32x+64 The formula is (a+b)² = a² + 2ab + b². a=2x, b=8, a²=4x², b²=64
Do you mean "what is the value of x when 3x - 2x = 15?" in that case, the value of x is 15
If you mean: x-3 = 2x-8 then the value of x works out as 5
If you mean the value of 15-2x when x is 2 then it is: 15-4 = 11
3 + 3 + 2x = 0 6 + 2x = 0 2x = -6 x = -6/2 x = -3