Solve the problem. See Example.EXAMPLE Finding the Value of an Unknown NumberIf 4 is multi...
Solve the problem. See Example.
EXAMPLE Finding the Value of an Unknown Number
If 4 is multiplied by a number decreased by 7, the product is 100. Find the number.
Step 1 Read the problem carefully. We are asked to find a number.
Step 2 Assign a variable to represent the unknown quantity.
Let x = the number.
Step 3 Write an equation.
Step 4 Solve the equation.
Step 5 State the answer. The number is 32.
Step 6 Check. When 32 is decreased by 7, we get 32 − 7 = 25. If 4 is multiplied by 25, we get 100, as required. The answer, 32, is correct.
The product of 5, and 3 more than twice a number, is 85. What is the number?
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