What additional information do you need to know in order to prove the two triangles are congruent using HL

How can we find the measure of an exterior angle if we know the measurement of an interior angle

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

12x + 1 = 25 solve the following equation. then place the correct number in the box provided.