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4X - 1 = 9 Is an equation. 4X - 1 = 9 4X = 10 X = 5/2 =====
It is: 2(4x+5)
To simplify the expression (4x + 6x), you combine like terms by adding the coefficients of (x). This gives you (4 + 6 = 10), so the simplified expression is (10x).
the + of a number and 10 k decreased by 4 = k-4
As an algebraic expression it is 10x