Wow! You did it! You just applied two different rules for solving equations in order to solve two-step equations. I know you are feeling better now!
Double Clothesline - Solving Equations | Mr. Orr is a
Since this lesson my class used the double number line to solve equations like 9x + 65 = 6x + 7. It was great to keep some continuity here while we solved harder equations.
Solving Two-Step Equations
I then said 8775 I 8767 m going to place this 65 right above the 8x and that means equivalence. 8x is the same as 65 8776
Intro to two-step equations | Algebra (video) | Khan Academy
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The next two examples will demonstrate how to solve two-step equations when the coefficient is a fraction or when you have a divisor. Let's take a look!
Student: 8775 The dividing is the easy part 8776 We spent a few minutes here talking about why dividing 67 by 8 here makes sense.
I want to know what number should be above 9x. I had them draw the number lines on their desks and let them work on determining the value of 9x.
We didn 8767 t want to re-invent a new were great at solving equations when one line was used for numbers and the other for expressions..so we wanted that. How can we get one line to be just numbers and one to have the expression? We subtracted 9x from both lines. Which left us exactly where we were last class!!
Going around the room there were a few different types of solutions. Some students said, 8775 8 times 8x is 9x, so 8 times 65 is 95 8776
Where should the 5x go? At first some students had some difficulty deciding if it should go to the left or right of 5x 7.
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