Solve Two Step Multiplication Equations
Learn about multiplication but using a two- step equation and we’re trying two different problems. The first one is (5a=-25). Now as we can see, the variable is a and it has been multiplied by five. Since this a multiplication operation, I can undo it by dividing by five. Make sure I do it on both sides, the left side and the right side. So, (5a/5) give me (1*a), this gives me (-25/5) is -5, which means the answer is (a=-5). That’s the first piece that we were looking for.
Now, let’s look at the second one. The second equation is (2x-4=10). Taking a little bit of extra space, as we can see, we’ve got a multiplication and we’ve got a subtraction. So, let’s tackle the subtraction first. Let’s add four to both sides of the equation. What that will do is leave the variable 2x or two times the variable on one side, (-4+4) is zero so the left side gets 2x, the right side is (10+4=14). So, now that I’ve got (2x=14), I will take this multiplication and inverse it or undo it by dividing by the value two. So, (2x/2) becomes x and (14/2) become 7. So ultimately, what I was looking for is the answer (x=7).
Now key to remember, what we have picked up in this track is when we were doing a single step equation then it was easy because all I have to do was convert the multiplication, nullify it by dividing by same value. In a two-step operation, first we have to subtract since the equation have a subtraction in it, we have to nullify that, leave only 2x on one side and then use the division to get (2x=7). So first answer is (a=(-5)) and the second answer is (x=7).
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