7b - 9b + 3 + 4b

what is the answer to this problem

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

[tex]5 \times1 \frac{12}{13} [/tex] me

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction