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Verified answer
1) 3A - 2B= 3(2t² - 3t ) - 2 ( 4t - 5t² )
= 6t² - 9t - 8t + 10t²
= 16t² - 17t ( C )
2) 2x + ( 10-5x / 5 )
= 2x + { 5(2 - x ) / 5 }
= 2x + 2 - x
= x + 2 ( A )