Consider just the first sentence of this multistep word problem. sentence 1: the sum of the ages of a brother and sister is 26. give an equation that represents this statement using b as the age of the brother and s as the age of the sister. express your answer in terms of the symbols b and s.

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?