Linear equations and 2-variable / 3-variable systems solved by Cramer's rule. 30 progressive levels.
Why this matters
Equations model unknowns from just enough facts, such as mixtures, plan comparisons, and shared work.
Levels Cleared
0%
Group 1
Count Down
Score 100 in 57s
x + b = c (warm-up)
Reach Target
Reach 150 pts in 58s
ax + b = c (small)
Last Problems
Last for 18 problems
ax + b = c (signed)
Last Time
Last for 43 seconds
ax + b = c (mastery)
Beat The Clock
Get 12 correct in 57s
ax + b = cx + d (small)
Group 2
Count Down
Score 115 in 54s
ax + b = cx + d (medium)
Reach Target
Reach 173 pts in 56s
ax + b = cx + d (signed)
Last Problems
Last for 21 problems
ax + b = cx + d (mastery)
Last Time
Last for 41 seconds
2-var Cramer - find x (small)
Beat The Clock
Get 14 correct in 54s
2-var Cramer - find y (small)
Group 3
Count Down
Score 130 in 51s
2-var Cramer - find x (medium)
Reach Target
Reach 195 pts in 54s
2-var Cramer - find y (medium)
Last Problems
Last for 24 problems
2-var Cramer - find x (signed)
Last Time
Last for 39 seconds
2-var Cramer - find y (signed)
Beat The Clock
Get 16 correct in 51s
2-var Cramer - find x (mastery)
Group 4
Count Down
Score 145 in 48s
2-var Cramer - find y (mastery)
Reach Target
Reach 218 pts in 52s
3-var Cramer - find x (small)
Last Problems
Last for 27 problems
3-var Cramer - find y (small)
Last Time
Last for 37 seconds
3-var Cramer - find z (small)
Beat The Clock
Get 18 correct in 48s
3-var Cramer - find x (medium)
Group 5
Count Down
Score 160 in 45s
3-var Cramer - find y (medium)
Reach Target
Reach 240 pts in 50s
3-var Cramer - find z (medium)
Last Problems
Last for 30 problems
3-var Cramer - find x (mastery)
Last Time
Last for 35 seconds
3-var Cramer - find y (mastery)
Beat The Clock
Get 20 correct in 45s
3-var Cramer - find z (mastery)
Group 6
Last Problems
Last for 12 problems
2-var realistic - find x (no timer)
Last Problems
Last for 12 problems
2-var realistic - find y (no timer)
Last Problems
Last for 12 problems
3-var realistic - find x (no timer)
Last Problems
Last for 12 problems
3-var realistic - find y (no timer)
Last Problems
Last for 12 problems
3-var realistic - find z (no timer)