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7(4 - t) = -84
i got:
28 - 7t = -84
-28 = -28
7t = -112
----- -----
7 = 7
t = -16

is this right : -16

7t = -112

It should be
-7t = -112

t = +16

oh ok i see thanks can you check another:
-5.5 (8+b) = -33
i got:
-44 + -5.5b = -33
+44 +44
__________________
-5.5b = 11
___________
- 5.5 = 5.5
b = -2

Right!

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