Does 2x + 8 = 12 ?
(1) 2x + 10 = 14
(2) 3x + 8 = 14
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wait is this really sub-505? felt almost too easy lol
right, both just solve straight to x. free point
haha yeah once you see 2x = 4 it's over
For (1) I got x and it worked, same with (2). So each one alone works, answer D.
quick q - do we even need to check if both give the same x value? Or does it not matter here
doesn't matter, just whether each alone answers the question
What it tests
Your ability to manipulate linear and quadratic expressions, substitute unknowns, and solve equations under time pressure.
Common trap
Losing a sign when moving terms across the equals sign, or dividing both sides by a variable that could equal zero.