Answer:
It is first one
Step-by-step explanation:
Answer:
We simplify the equation to the form, which is simple to understand
5x+15=4x-12
We move all terms containing x to the left and all other terms to the right.
+5x-4x=-12-15
We simplify left and right side of the equation.
+1x=-27
then divide both sides of the equation by 1 to get x.
x=-27
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Thus ;

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Just take the answer of the subtraction problem and add it to the other number for an answer Example h-7=14 14 + 7=21 h=7