I'll give you a question, please answer with step-by-step reasoning process.
Antoinette weighs 7 less kilograms than twice Rupert's weight. Together they weigh 98 kilograms. How many kilograms does Antoinette weigh?

63
Let R = Rupert's weight.

Antoinette = 2R - 7.

R + 2R - 7 = 98.

3R = 105.

Rupert = 35 kg.

Antoinette = 2 * 35 - 7 = 63 kg.

Antoinette weighs 63 kilograms.

.

The answer: 63