Question

4+7a=12+8a with steps pls

Answer 1

4+7a=12+8a

step 1: subtract 7a from both sides.
now you have 4=12+a

step 2. subtract 12 from both sides.
now you have -8=a

the answer is a=-8


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Answer 2

Answer:a=-8

Step-by-step explanation:

4+7a=12+8a

So first you want to have the variables on the same side

4+7a-7a=12+8a-7a

This is how you got the 7a to the right side. Then you subtract 8a-7a So the equation becomes

4=12+a

Now there are two ways of doing this.

1. 4-12=12-12+a

You moved the 12 to the left side so you have the same variable on one side

4-12=-8

So then a=-8

Or

2. 4-4=12-4+a

0=8+a

then you would have to subtract 8 to keep 'a' by itself

-8=8-8+a

simplify it

-8=a

same thing