Constant/s Variable/ 1) 2x + 7y

2) 12mn

3) 3X-5

4) k
7

5. – 8(a+b+c)

6. x² + xy – y²

7. abc-8

8. c'-5d

9.(x+y)
3x

10.9b ÷ (a + b)​

Add the fractions and simplify 1/2+ 1/3

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

Which ordered pair is a solution of the equation? y + 5 = 2(2+1) choose 1 answer ® only (5,10 ® only (-1,-5) © both (5, 10) and (-1,-5) 0 neither