2001 CEMC Gauss (Grade 8) Problems/Problem 5

Problem

If $2x - 5 = 15$, the value of $x$ is

$\text{ (A) }\ 5 \qquad\text{ (B) }\ -5 \qquad\text{ (C) }\ 10 \qquad\text{ (D) }\ 0 \qquad\text{ (E) }\ -10$

Solution

We can simply solve the equation:

$2x - 5 = 15$

$2x = 15 + 5 = 20$

$x = 20 \div 2 = \boxed {\textbf {(C) } 10}$

~anabel.disher

2001 CEMC Gauss (Grade 8) (ProblemsAnswer KeyResources)
Preceded by
Problem 4
Followed by
Problem 6
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CEMC Gauss (Grade 8)