which is not true?

Question

A. 8 + 7 = 7 +8
B. 8 = 12 - 4
C. 11+ 4 = 7+ 8
D. 8 = 7 = 13 - 2

Answer 1

Let's evaluate each statement to determine which one is not true.

A. $8+7=7+8$
This is true because of the commutative property of addition.

B. $8=12-4$
This is true because $12-4$ equals $8$.

C. $11+4=7+8$
Calculating both sides:
$11+4=15$
$7+8=15$
This is true.

D. $8=7=13-2$
This is ambiguous because it attempts to assert equality among three terms. The correct interpretation would be $8=7$ (which is false) and $7=13-2$ (which is true, as $13-2$ equals $11$). Therefore, not all parts of this equation hold true.

So, the statement that is not true is D.