This equation is not possible to solve on it's own since it has 3 variables (b, x and y). For this reason, we would need to use simultaneous equations with at least 3 separate equations
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The simplified expression is -9a -9b.
There are 3 terms in the given expression of 6a+9b+15
9b + 6 - 8 = -36 9b = -38 b = 4.2222222(repeating)
You would factor 3a + 9b as: 3(a+3b)
2a + 3 - 9b - a - 7 Bring like terms together: = 2a - a - 9b + 3 - 7 Combine like terms: = a - 9b - 4