| x | + | 5 | = | 12 |
| Start with: | x + 5 = 12 |
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What you are aiming for is an answer like "x = ...", and the plus 5 is in the way of that! If you subtract 5 you can cancel out the plus 5 (because 5-5=0) |
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| So, let us have a go at subtracting 5 from both sides: | x+5 -5 = 12 -5 |
| A little arithmetic (5-5 = 0 and 12-5 = 7) becomes: | x+0 = 7 |
| Which is just: | x = 7 |
| Solved! | |
| (Quick Check: 7+5=12) |
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