What should be done so that the expression will have a value of 10? 12 - 2 + 22 ÷ 8 Add parentheses around 2 + 2. Add parenthese
1 answer:
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Write the system in augmented-matrix form:
Row reduce this matrix:
- Add -1(row 1) to row 3:
- Add 3(row 4) to row 3:
- Multiply row 3 by 1/5:
- Add -2(row 3) to row 4:
- Add -2(row 3) and -1(row 4) to row 1:
This matrix tells us that ,
, and
, but clearly
, so there is no solution.