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How to solve 3x - 4 = 9? Get the answer and stepwise instruction to solve linear equation in one variable 𝒙.
We have 3x - 4 = 9
First, we move the non x terms to the RHS of the equation. To do this, we add 4 to both sides.
Note: if a = b, then a + c = b + cTherefore, 3x - 4 + 4 = 9 + 4
or, 3x = 13
Next, divide both sides by 3, which is the coefficent of x
Note: if a = b, then a ÷ c = b ÷ c3x3 = 133
x = 133 or, x = 4.33
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