Answer: 33/4
Explanation:
2(4x+6)=78
8x+12=78
8x = 78-12
8x=66
X=66/8
x= 33/4
In another way,
4x+6=78/2
4x+6=39
4x=39-6
4x=33
x= 33/4 (Answer)
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