2a + 4b = d for b i trying to solve for b. i don't understand how to isolate the variable.

What two consecutive odd integers have a sum of -28

Solve the system by the elimination method. 3x - 2y - 7 = 0 5x + y - 3 = 0 to eliminate y, the lcm is 2. which of the following is the resulting equations? 1.3x - 2y - 7 = 0 5x + y - 3 = 0 2.3x - 2y - 7 = 0 -10x - 2y + 6 = 0 3.3x - 2y - 7 = 0 10x + 2y - 6 = 0

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?