-x+3x-2,si x=3

To find the value of the expression -x + 3x - 2 when x is equal to 3, you can substitute the value of x into the expression and simplify: -3 + 3(3) - 2 Now, perform the calculations step by step: -3 + 9 - 2 Now, add and subtract: -3 + 9 = 6 6 - 2 = 4 So, when x is equal to 3, the expression -x + 3x - 2 equals 4.