Open Middle®
Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to create two expressions that are equivalent to one another.
Hint
What values will make the constants equivalent? What values will make the variable terms equivalent?
Answer
Here are some possibilities:
1x + 2x + 9 + 3x = 4 + 6x + 5;
1x + 2x + 8 + 4x = 3 + 7x + 5
1x + 2x + 9 + 3x = 4 + 6x + 5;
1x + 2x + 8 + 4x = 3 + 7x + 5
Source: Will Case
answer 3x+2x+8+4x=1+9x+7
8x+5x+2+4x=4+5x+9
good
Answer: 1x+2x+3+1x=4x+3
5x + 3x + 4 + 1x = 3 + 9x + 1
I changed my answer. 4x + 2x + 8 + 3x = 7 + 9x + 1
3x + 8x + 4+ x = 2 + 12x + 2
3x+1X+8+5x=6+9x+2
answer 5x +3x + 4 + 2x = 3 + 7 + 4x