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(21 x 2,54) / 9 = 5,92666667
You need to divide to compare: 9/17 = 0.529 11/21 = 0.524 as you can see, 9/17 is larger
1/7 x 12/9 = 12/63 = 4/21
The equation is 12y - 9 = 21. To solve for y, you can start by adding 9 to both sides to isolate the term with y. This gives you 12y = 30. Next, divide both sides by 12 to solve for y, which gives y = 2.5.
-x + 9 - 2x = -21 combine like terms -x and -2x isolate -3x by subtracting 9 from both sides divide both sides by -3 -3x + 9 = -21 - 9 - 9 -3x = -30 x = 10