Question

8 - 4a = -2a


7th Grade Linear Questions

Answer 1

a = 4

Explanation:

So your goal here is to get the variable on just one side, so add 4a to both sides. This cancels out the 4a on of of the sides and puts a on the other side. The new equation is 8 = -2a + 4a. Combine like terms to get 8 = 2a. Divide both sides by 2 to get a = 4. You can check your work by replacing a with 4:

8 - 4(4) = -2(4)

8 - 16 = -8

-8 = -8

Since the final result is true, (-8 does equal -8,) a = 4.

Answer 2

Add 4a to both sides:
8 = 2a
Divide both sides by 2:
a = 8/2
a = 4