The idea
The whole skill is one idea — whatever you do to one side you do to the other — applied in the right order. Undo addition before multiplication, because that is the reverse of the order the expression was built in.
Lesson
No lesson built yet. The worked solutions below are the material it would be assembled from.
Questions (6)
| Question | Type | Difficulty | Drift | Accuracy |
|---|---|---|---|---|
| Solve for x: 3x + 5 = 20 | numeric | Easy -1.33 | +0.27 | 0% (1) |
| Solve for x: 4(x − 3) = 2x + 6 | numeric | Easy -1.10 | — | — (0) |
| Solve for x: (x + 2)/3 − (x − 1)/4 = 1 | mcq | Moderate -0.40 | — | — (0) |
| Solve for x: 2(x + 1) = 2x + 2. Then explain what your result means. | short | Moderate 0.30 | — | — (0) |
| A phone plan costs £12 per month plus 8p per minute. Another costs £20 per month with unlimited minutes. At ho… | numeric | Hard 0.60 | — | — (0) |
| Solve for x: (2x − 1)/(x + 3) = 3 (x ≠ −3) | numeric | Hard 1.20 | — | — (0) |