Writing Algebraic Equations

Match the written expression to its algebraic expression. Remember multiplication can be shown by writing the known number next to the variable and the ' sign shows division. 7 minus n equals 2 7-n = 2 p divided by 7 is 3 p = 3 3 is added to p to make 10 3+p = 10 5 times q is 25 5q = 25 Take away 6 from g to get 12 g-6 = 12 9 less than b is 8 b-9 = 8 the Sum of n and 5 is 21 n+5 = 21 Write word problems as algebraic expressions Click here to watch the video, when asked for your name click on the 'x', come back here to answer questions about the video. Choose the algebraic equation that matches the word problem. Mike had 23 dollars. He washed cars over the weekend and now has 90 dollars. How much money did he make washing cars? 23 + x = 90 There were 16 bales of hay in the barn. Keith stacked more bales in the barn today. Now there are 93 bales of hay. How many bales did he store in the barn? 16 + x = 93 Sally is baking a cake. The recipe calls for 9 cups of flour. She already put in 4 cups. How many more cups does she need to add? 9 - 4 = x After paying 8 dollars for a pie, Mary has 50 dollars left. How much money did she have before buying the pie? x - 8 = 50 How many digital movie downloads can you buy with 150 dollars if each one costs 15 dollars? 150 = x Match the verbal description with the equation, Six more than three times a number is eighteen 3x + 6 = 18 Eighteen times a number minus nineteen is eighty nine 18x - 19 = 89 Eighteen divided by three plus six more is x. 18 + 6 = x Eighty-nine minus a number, doubled makes 19 2(89 - x)= 19