Question

Simplify: 10x+2x-3= 9
A. x=-1
B. x=-2
C. x=1
D. x=2

Answer 1

C. x = 1

Explanation:

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Answer 2

C. x = 1

Explanation:

Combine like terms

10 + 2 − 3 = 9

12 − 3 = 9

Add 3 to both sides of the equation

12 − 3 + 3 = 9 + 3

Add the numbers

12 = 9 + 3

12 = 12

`(12x)/(12) = (12)/(12)`

Cancel terms that are in both the numerator and denominator

`x = (12)/(12)`

Divide the numbers

x = 1

Therefore the correct answer is C. x = 1