Question

A − 19 + 18 = − 19 + 18 −19x+18=−19x+18 minus, 19x, plus, 18, equals, minus, 19, x, plus, 18 (Choice B) 19 + 18 = − 19 + 18 19x+18=−19x+1819, x, plus, 18, equals, minus, 19, x, plus, 18 B 19 + 18 = − 19 + 18 19x+18=−19x+1819, x, plus, 18, equals, minus, 19, x, plus, 18 (Choice C) 19 − 18 = − 19 + 18 19x−18=−19x+1819, x, minus, 18, equals, minus, 19, x, plus, 18 C 19 − 18 = − 19 + 18 19x−18=−19x+1819, x, minus, 18, equals, minus, 19, x, plus, 18 (Choice D) − 19 − 18 = − 19 + 18 −19x−18=−19x+18 minus, 19x, minus, 18, equals, minus, 19, x, plus, 18 D − 19 − 18 = − 19 + 18 −19x−18=−19x+18minus, 19, x, minus, 18, equals, minus, 19, x, plus, 18

Answer 1

The answer is (D) −19 − 18 = −19 + 18.

Explanation:

The answer is (D) −19 − 18 = −19 + 18.

19 - 18 = 1

-19 + 18 = -1

Therefore, -19 - 18 = -1 and -19x - 18 = -19x + 18.

The other choices are incorrect because they do not represent the correct mathematical operations. For example, 19 + 18 = 37 and -19 + 18 = -1, so 19 + 18 = -19 + 18 is not a correct equation.

The answer choice (B) is incorrect because the variable x is not present in the equation 19 + 18 = -19 + 18.

The answer choice (C) is incorrect because the equation 19 - 18 = -19 + 18 is not true. As shown above, the correct equation is `-19 - 18 = -1**.

The answer choice (D) is correct because the equations -19 - 18 = -1 and -19x - 18 = -19x + 18 are both true.