exam Maths Puzzle Numerical Ability

solve and check please..

-6x+2-2(x+1)=6x+6

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exam Other Question

Which of the following cannot be a base for exponential and logarithmic functions?
0.1
π
1
e 2 cars start from the same place and time, traveling in opposite directions, one averaging 65km p/h, the other 90km p/h. After how long will they be 450km apart ?