Solve the question
4(x + 6) = (2x + 12 )

x= -6

Step-by-step explanation:

Isolate the variable by dividing each side by factors that do not contain the variables.

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x = -6

Step-by-step explanation:

For this one, set bot angles equal to 180 like this:  

2x-9+5x-7=180

The reasoning is a straight line has an angle of 180 and the two angles being in opposite positions, you can set them equal to 180.

Now combine like terms:

2x+5x=7x

-9-7=-16

Now your new problem looks like:

7x-16=180

Next isolate the x:

7x-16+16=180+16

7x=196

Now divide by 7 to make the x by itself:

7x/7=196/7

This comes out even to x=28.

Now since it is a word problem, higher math says to answer it in the same format:

To make m and n congruent, x has to equal 28.

Hope this helps!