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Check My Work
Stuck on a question? See exactly which line went wrong.
Type your working or photograph your page. BILKEYS marks it line by line, stops at your first mistake and explains it in plain words, then turns it into a flashcard so you never make it again.
Your working
1 mistake foundSolve 2x + 5 = 17
2x = 17 + 5
Line 2: You added 5 instead of subtracting it. Moving +5 across the equals sign makes it −5.
2x = 22
x = 11
We stop at your first mistake, because everything after it follows from that one line.
How Check My Work works
Step 1
Type or photograph it
Paste your working or snap a photo of the page. Handwriting is fine.
Step 2
We mark every line
Each line is checked against the correct method, not just the final answer.
Step 3
Fix your first mistake
We stop at the first wrong line, since everything after it follows from that one.