exam Maths Puzzle Numerical Ability

Please help me solve this equation: 2(3x+6)+8=6x

So Far I have:
2(3x+6)+8=6x
6x+12+8=6x
6x+20=6x
20=0?

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exam Other Question

write equation in standard form

y-1=2(x+1)
Preform the indicated divison


x4+4x3+6x2+4x+1
----------------
x+1


the numbers after the x such as 4x3 is 4x to the third power