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学习如何书写简单的代数表达式。 Sal Khan 创建


What I want to do in this video is to write the algebra expresssion The sum of -7 and the quantitt 8 times x so the sum,the sum and the quanity 8 times x , so the 8x over there so -7+8x Let's do the next one. Take the quantity -3 times x and then add 1, add 1 so the quantity -3 times x Now this one. -6 plus,-6 plus -6 plus something so the product -1x is the same thing -x or we can just write this -6-x and we're done.