book Maths Puzzle Numerical Ability

i need some help on problem number 30 in algebra structure and method book 1. the problem is 0=3(1-2t)-5(2-t). here is how i did it,

0=3-6t-10+5t
then

0=-7-6t+5t

0=-7-1

that is as far i can go. help?

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book Other Question

Can someone please help me with this problem I have been working on it all day.
Multiply
(x-2)(3x-6)(x+3) Find 4 consecutive integers such that the product of the first and second integers minus 2 is equal to 3 times the product of the third and fourth integers.