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SmartyTarty
8 or 4 i think i am 50% sure sorry if i am wrong

benlaw5502
answer is 6
right hand side = 8x + 12
thus number missing must make brackets equal 6x +12 so with the +2x both sides are equal.
hence ans =6

(2 = 4x+4
4= 6x + 8
8= 10x + 16)

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