Two Equation Rate Problems | Index |

a X b = cFor example:

rate X time = distance rate X time = wage rate X value = taxportion / whole = fraction Or the equation may be more complex as in

rate1 X time1 + rate2 X time2 = wageSome problems will have auxiliary formula's with addition or subtraction as the operator as in

number of apples + number of pears = number of fruitMost story problems are based on one or more standard equations. An important first step in solving these problems is to identify the equations needed. This is easily accomplished by selecting the equation that has the same elements as stated in the problem. Frequently, the equations are so obvious as not to be stated in the text books. For example:

total = number right + number wrong. Or they are known in a very general form: the total is equal to the sum of the parts.Many Class I problems consists of single equations that can be solved directly from the values given in the problem. For example, some simple problems are:

Some Class I probems are two equation rate problems to solve.