Question

Solve the given linear equation for a 3a + 6 = 2a -7​

Answer 1

Answer:

a=-13

Step-by-step explanation:

Primary method:

3a+6=2a-7

3a-2a+6=2a-7-2a

a+6=-7

a+6-6=-7-6

a=-13

Secondary method:

3a+6=2a-7

3a-2a+6=-7

a=-6-7

a=-13

notes: (/=divided by sth)

+ is - when u throw it to either side:

a+b=c+d

throw a to the right:

b=c+d-a

this is the same for -:

-a+b=c+d

b=a+c+d

x is ÷ when thrown to the right:

axb=cxd

b=cd/a

Same goes for ÷:

a÷b=cd

a=cdxb

these apply for both sides, no matter the case, meaning the operations work on either side.

remember that in some cases some operations will be used first, like:

a+b/c=d

a+b=cd

like so for the other operators.