Answer:
The value of x is 9.
Step-by-step explanation:
1 + I2 + xI = 9 Get rid of the absolute bars
1 + 2 + x = 9 Combine like terms
3 + x = 9 Isolate the variable by subtracting 3 on both sides
x = 9
You must isolate the variable in order to solve equations with variables.
Isolating variable is basically when you divide, multiply, add, or subtract to put a variable on ONLY one side of the equation.
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