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asked 2 years ago
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You work it out by swapping the figures/numbers from one side to the other, remembering that when you do that the+ will change to a-, and vice versa.
So we could start by saying "OK, we can keep this equation in balance if we add 7x to both sides.
On the left side, adding 7x means we no longer have -7x. So we get
10=-6x +7+7x
-6x +7x gives us just the single x. Therefore
10= 7+x
now we can take 7 from both sides and we get 3=x
ok?
So we could start by saying "OK, we can keep this equation in balance if we add 7x to both sides.
On the left side, adding 7x means we no longer have -7x. So we get
10=-6x +7+7x
-6x +7x gives us just the single x. Therefore
10= 7+x
now we can take 7 from both sides and we get 3=x
ok?
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