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Inês André
Simultaneous equations are tricky to do at first, but once you get the hang of them it’s easy. I always like to think of them as a scale ⚖️, you want the two tips to be balanced. So first I’d start by getting a different colored pen and naming the two equations: equation 1 and equation 2.
Next you’ll want to look at both equations and think on how you can make either x or y equal the same number. This might involve having to multiply or divide one of the equations.
Now let’s say that for equation 1 you have +2x and that for equation 2 you have -2x, here you would do = equation 1 + equation 2.
But what if both equations had +2x? Well in that case you would do = equation 1 - equation 2.
Following so far? Well here comes the easy part: now that you’ve done that, you’ll just have something like this left: 3y = 12. And all that’s left to do is solve for y. Once you’ve done this you can insert the value of y into equation 1/2 to solve for x.
I hope this helped, but if you need any help let me know!
Have a lovely day,
Izzie
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