Antoinette weighs 7 less kilograms than twice Rupert's weight. Together they weigh 98 kilograms. How many kilograms does Antoinette weigh?
Let R = Rupert's weight
Antoinette = 2R - 7
R + 2R - 7 = 98
3R = 105
Rupert = <<35=35>>35 kg
Antoinette = 2 * 35 - 7 = <<2*35-7=63>>63 kg
Antoinette weighs 63 kilograms.
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