bjr
1) 9(y + 5) - 6y +45
= 9*y + 9*5 - 6y + 45
= 9y - 6y + 45 + 45 = 3y + 90
2) 6(d + 3) + 5(3+d)-(-5+6d)
= 6*d + 6*3 + 5*3 + 5*d + 5 - 6d
= 6d + 18 + 15 - 5d + 5 - 6d
= -5d + 38
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bjr
1) 9(y + 5) - 6y +45
= 9*y + 9*5 - 6y + 45
= 9y - 6y + 45 + 45 = 3y + 90
2) 6(d + 3) + 5(3+d)-(-5+6d)
= 6*d + 6*3 + 5*3 + 5*d + 5 - 6d
= 6d + 18 + 15 - 5d + 5 - 6d
= -5d + 38