Question

3 (x + 1 ) = 12 +4 (X - 1 )​

Answer 1

Answer:

3x+3=12+4x-4

or, 3x-4x=12-4-3

or, -x=12-7

or, -x=5

or, x=-5

Step-by-step explanation:

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Answer 2

Answer:

x=19by13

Step-by-step explanation:

3(x+1)=12+4(x-1)

=3x+3=16(x-1)

=3x+3=16x-16

=3x-16x=-16-3

=-13x=-19

=x=19by13