Solving a linear equation

by Gracie
(USA)

Question
What is 5n - 2n + 12 + 20 = 5

Answer
STEP 1:    Here, we need to find the value of n. We note that the terms 5n and 2n are like terms. So, we first subtract 2n from 5n.
5n subtract 2n gives 3n

STEP 2:    Now, we add the like terms 12 and 20 to further simplify the expression.
adding 12 with 20 gives 32

STEP 3:    Next we have to isolate the variable term 3n so that it becomes easy to evaluate n. For this, we subtract 32 from both sides of the equation.
subtract 32 on both sides

STEP 4:    To get the value of n, the only step left now is to isolate n in the equation. We divide both the sides by 3 to evaluate n.
answer is -9

The value of n is –9.

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